ANR-623 WILDFLOWERS IN ALABAMA LANDSCAPES
ANR-623, Revised Nov 2001. Raymond Kessler, Jr., Extension Horticulturist, Associate Professor, and Bethany
Carden, Undergraduate Assistant, both in Horticulture at Auburn
University. Originally prepared by Bridget K. Behe, former
Extension Horticulturist, and Lillis V. Purvis,
former Graduate Assistant.
| Wildflowers in Alabama Landscapes |
Alabamians are increasingly aware of the natural beauty
afforded their state through its rich abundance of wildflowers.
Some native Alabama wildflowers are easily grown, and many require
less water and soil preparation than traditional landscape plants.
Alabama has many different climates and geological characteristics
where different groups of wildflowers are found. Current environmental
concerns emphasize colorful wildflowers that can be incorporated
into different landscapes.
Wildflowers are very enjoyable plants, but their use in residential
and commercial landscapes is often overlooked. Native plants not
only protect and maintain the native environment, but also add
beauty and diversity to the landscape. Many wildflowers are easily
grown and reward the gardener with many seasons of beauty as perennials
or by readily reseeding themselves with little or no assistance.
With prudent care, native plants can be preserved in their native
habitats or established in the urban landscapes.
Conservation of native wildflower species is necessary to maintain
the plants themselves and the biological diversity of animals
and insects associated with them. The Alabama Natural Heritage
Program is a branch of The Nature Conservancy of Alabama and is
responsible for identifying elements of biodiversity to be protected.
The Endangered Species Act of 1973 defines an endangered species
as one that is "in danger of extinction throughout all or
a significant portion of its range" and a threatened species
as one "likely to become endangered within the foreseeable
future." Plants that are on the federal list are not to be
removed from federal lands or any other lands, unless they are
in danger of being destroyed due to construction. Table 1 lists
endangered and threatened plants in Alabama that are on the federal
list.
Table 1.
Endangered and Threatened Plants of Alabama
| Listing |
Scientific
Name |
Common
Name |
| T |
Amphianthus
pusillus |
Pool
Sprite |
| T |
Apios
priceana |
Price's
Potato Bean |
| T |
Asplenium
scolopendrium |
American
Hart's-tongue Fern |
| E |
Clematis
moorfieldii |
Morefield's
Leatherflower |
| E |
Clematis
socialis |
Alabama
Leatherflower |
| E |
Dalea
foliosa |
Leafy
Prairie Clover |
| T |
Helianthus
eggertii |
Eggert's
Sunflower |
| T |
Lesquerella
lyrata |
Lyrate
Bladder-pod |
| E |
Lindera
melissaefolia |
Pondberry |
| T |
Marshallia
mohrii |
Mohr's
Barbara's bottoms |
| E |
Ptilimnium
nodosum |
Harperella |
| T |
Sagittaria
secundifolia |
Kral's
Water-plantain |
| E |
Sarracenia
oreophila |
Green
Pitcher Plant |
| E |
Sarracenia
rubra var. alabamensis |
Alabama
Canebrake Pitcher Plant |
| E |
Schwalbea
americana |
American
Chaffseed |
| E |
Spigelia
gentianoides |
Pinkroot
Gentian |
| T |
Thelypteris
pilosa var.
alabamensis |
Alabama
Streak-sorus Fern |
| E |
Trillium
reliquum |
Relict
Trillium |
| E |
Xyris
tennesseensis |
Tennessee
Yellow-eyed Grass |
Key:
Listing
E = Endangered: Danger of extinction in all or part of its range
T = Threatened: Likely to become endangered in foreseeable future
in all or part of its range |
When purchasing wildflower plants, special consideration should
be given to how nurseries obtain their products for sale. Ask
if plants have been nursery propagated. Do not purchase plants
or seeds collected from the wild; this is not good conservation
practice. Besides complying with the Endangered Species Act, avoiding
the possible incorporation of ild-collected plants in the landscape
will preserve natural populations and help ensure the success
of plants after transplanting. Wildflowers dug from the wild rarely
thrive when transplanted to the home garden and often die from
transplant shock because they lack strong root systems. Nursery-propagated
and -grown plants have stronger, more compact root systems that
will establish reliably in the landscape. Seed collected from
the wild also may include undesirable weed and grass seeds.
Previously, wildflowers were defined simply as plants that
are not normally cultivated. However, that definition no longer
applies, because the demand for wildflowers is being met by producers
of wildflower seeds and plants. Today, wildflower species are
being further defined:
- Native species--plants that occur naturally in a particular
area without the intervention of human beings
- Indigenous species--plants that prosper in a distinct region
or particular environmental habitat
- Naturalized species--plants that were first introduced by
human beings and have now become established over time throughout
an area
- Escaped varieties--plants originally introduced from other
parts of the world, adapted to a particular region, and are now
found in uncultivated portions of the region
Because many wildflowers are commercially produced as seeds
or plants, they can offer a low-maintenance, cost-efficient landscaping
alternative while preserving the local environment. Wildflowers
are easy to use in the landscape when care is taken to select
species whose natural environment closely matches the landscape
environment where they will be planted or when the natural growing
conditions are duplicated as closely as possible. For example,
a wildflower that grows naturally on a slope under the canopy
of trees will probably perform poorly in direct sunlight or in
an area with inadequate soil drainage. Following are uses for
wildflowers:
- A backyard wilderness can preserve the best local wildflowers
and encourage wildlife to visit the garden.
- A border of wildflowers near a vegetable garden will attract
pollinators like honeybees, butterflies, and hummingbirds.
- A patio area of an apartment can be an interesting conversation
piece by planting colorful and unusual specimens in clay pots
and wooden barrels.
- A cut flower garden can be enhanced with native perennials
and reseeding annuals, because they are prolific bloomers with
few disease and pest problems.
- A flowering border can be enlivened with the addition of
striking wildflower perennials.
- A commercial landscape can show that a business cares about
conservation by using those wildflowers that are drought tolerant
and relatively maintenance free.
- A roadside near a country home can be made more welcoming
with the addition of easily maintained wildflowers.
Getting Started
Plant Selection
Many wildflower species are annuals, but others have longer
life cycles including biennials and perennials. Annuals are plants
that complete their entire life cycle (seed to flower to seed)
within a single growing season. All roots, stems, and leaves of
annuals die each year. Biennials require 2 years to complete their
life cycles. Vegetative growth occurs the first year, and flowering,
seed production, and plant death occur the second year. Perennials
persist for many growing seasons, and while the leaves and stems
of the plant may die each winter, the plant regrows the following
spring from persistent roots or stems. There are some perennials
(for instance, tickseed or oxeye daisy) that keep their leaves
year-round (evergreen) and create attractive borders and ground
covers. Some perennials require 2 to 3 years to grow into large
flowering plants from seed. Therefore, include annuals and biennials
to ensure a colorful display of flowers. Annuals, biennials, and
perennials are found in all settings: meadow, alpine, aquatic,
bog, and timber stands. Many wildflowers are extremely sensitive
to areas other than their native locale and may not attain satisfactory
growth if those conditions are not met in the landscape. Wildflowers
that have symbiotic relationships with fungi or bacteria in their
native soil must have some native soil to grow successfully in
the landscape. Environmental factors such as climate, temperature,
rainfall, altitude, exposure to sun or shade, soil type, and soil
pH must be considered when attempting to add native plants to
the landscape.
Wildflower Sources
The least expensive way to obtain native plant material is
to purchase seeds that can be sown into flats or pots or directly
into properly prepared seedbeds outdoors. The National Wildflower
Research Center recommends purchasing seed mixes containing a
high percentage of wildflower species indigenous to the specific
area to be planted. Usually, these mixes are blended and labeled
for specific U.S. regions (Northeast, Southeast, etc.). Ask your
wildflower seed supplier for a seed mix specifically for your
area.
Seed dormancy and sowing time are key factors in successful
germination of wildflower seed. Seed of many native plants have
mechanical or chemical barriers that prevent seed from germinating
under conditions normally favorable to germination, called dormancy.
Seed dormancy can be overcome by sowing the seed outdoors in the
cool, moist months of fall and exposing the seed to winter conditions.
Dormancy is satisfied during the winter, and the seeds germinate
in the spring. Seed of other wildflower species normally germinate
in the fall, allowing the seedlings time in the winter to develop
a strong root system for spring growth. Keep in mind that wildflower
seeds require consistent soil moisture to germinate; therefore
keep the soil evenly moist until seedlings are well established.
Young plants (transplants) may also be purchased at relatively
low cost; this is the best method for wildflower species that
are difficult to germinate from seed. Larger plants, including
woody trees and shrubs, are sometimes available as container-grown,
balled-and-burlapped, or bare-root plant material. Not all species
are available as large plants, but those that are will generally
establish faster in the landscape. Perennial wildflowers can be
purchased as bare-root crowns or in containers from nurseries,
garden centers, or mail-order companies. Spring is usually the
best time to transplant container-grown plants into the landscape.
Bare-root trees, shrubs, and perennials should be planted from
early to late winter when the plants are dormant.
Wildflowers that are perennials benefit from regular maintenance.
Those that grow as clumps benefit from dividing every 3 to 5 years.
To divide a plant, carefully dig the plant and break the clump
apart by pulling or cutting it into small sections. Each section
can then be replanted separately. Be sure that each section to
be replanted has healthy roots and buds. The best time to divide
perennial wildflowers is in the late fall after shoots have been
killed by frost or in the spring as new growth begins. Some perennial
wildflowers also benefit from midseason pruning by producing a
second flush of flowers. Species such as yarrow, milkweed, and
coneflowers will bloom a second time a month or two after their
normal blooming time if faded flowers are promptly removed.
Seeds or plants that are obtained and grown close to the landscape
location will be better adapted to the area. Choose nurseries
that are located nearest the landscape or ones that produce seed
from cultivated plants grown locally. Table 2 lists commercial
and retail sources of wildflower seeds and plants.
Table 2.
Sources for Wildflower Seeds and Plants
| Company
Name and Mailing Address |
Type
of Business |
Plants
Available |
W.
Seeds Available |
Applewood
Seed Company
5380 Vivian St., Arvada, CO 80002 |
M,
W |
|
A,
B, P, C |
Beersheba
Wildflower Gardens
Stone Door Road, Beersheba Springs, TN 37305 |
M,
R, W |
V,
H, B |
|
Ben
Pace Nursery
Route 1, Box 925, Pine Mountain, GA 31822 |
M,
R |
H,
S, T |
|
Brookside
Wildflowers
Rt. 3, Box 740, Boone, NC 28607 |
R |
C,
H |
|
Dabney
Herbs
P. O. Box 22061, Louisville, KY 40222 |
R |
H,
V |
|
Eco-Gardens
P. O. Box 1227, Decatur, GA 30031 |
M,
R, W |
H,
V |
|
Flowerplace
Plant Farm
P. O. Box 4865, Meridian, MS 39304 |
M,
W |
H |
|
Gardens
of the Blue Ridge
P. O. Box 10, Pineola, NC 28662 |
M,
R, W |
H,
T, S, V |
|
Harris
Moran Seed Company
3670 Buffalo Road, Rochester, NY 14624 |
M,
R, W |
|
A,
B, P |
Homochito
Outdoors
P. O. Box 630, Meadville, MS 39653 |
M,
R, W |
A |
A,
B, P, C, PM |
H.
G. Hastings Co.
P. O. Box 4274, Atlanta, GA 30302 |
M |
H,
B |
M,
PM, C |
Hastings
Nature & Garden Center
P. O. Box 4274, Atlanta, GA 30302 |
R |
C |
M,
PM, C |
Lamtree
Farm
Rt. 1, Box 162, Warrensville, NC 28693 |
M,
R, W |
T,
S |
|
Magnolia
Nursery & Display Garden
12615 Roberts Road, Chunchula, AL 36521 |
M,
R, W |
H,
T, S, C, B |
|
Native
Nurseries
1661 Centerville Road, Tallahassee, FL 32308 |
R |
H,
S, T |
PM |
Park
Seeds
Highway 254 North, Greenwood, SC 29647 |
M,
R, W |
|
A,
B, P, M, PM |
Pennington
Seeds
P. O. Box 240, Madison, GA 30650 |
M,
R |
|
M,
PM |
Perry's
Water Gardens
191 Leatherman Gap Road, Franklin, NC 28734 |
M,
R, W |
A,
B, C |
|
Salter
Tree Farm
Route 2, Box 1332, Madison, FL 32340 |
M,
R, W |
H,
T, S, V |
|
Wildflower
Nursery
1680 Highway 25-70, Marshall, NC 28753 |
M,
R, W |
H,
T, S, V |
|
Wildseed,
Inc.
P. O. Box 308, Eagle Lake, TX 77434 |
M,
R, W |
|
A,
B, P, C, PM |
Key:
| BUSINESS |
PLANTS |
WILDFLOWER
SEEDS |
| M=
Mailorder |
A
= Aquatic |
A
= Annual |
| R
= Retail |
B
= Bare root |
B
= Biennial |
| W
= Wholesale |
C
= Container |
C
= Custom Blends |
| |
H
= Herbaceous |
M
= Mixes |
| |
T=
Trees |
PM
= No grass seeds in mixes |
| |
S
= Shrubs |
|
| |
V
= Vines |
|
Site Selection
Just as any landscape for cultivated annuals, perennials, and
shrubs is planned, so should the wildflower garden be planned.
It can be a meadow, woodland, bog, or any other natural setting.
The characteristics of the site will determine the wildflower
selections. Generally, most wildflowers prefer a well-drained
soil and a sunny location in the landscape. However, there are
shade- and water-loving wildflowers to choose from.
Four to 6 weeks before planting, have the soil analyzed for
pH level and fertility. Your county Extension office can assist
with this if you have any questions. The pH scale (from 0 to 14)
is a measure of relative acidity or alkalinity. Neutral soil has
a pH of 7. Values lower than 7 are acidic and those higher than
7 are alkaline. While many plants grow well within a range of
6 to 7, many wildflowers require a specific pH outside this range.
Knowing the pH of the soil helps in selecting wildflower species.
Wildflowers generally do not require highly fertile soils. Fertilization
may stimulate undesirable weed growth or even inhibit growth of
some wildflower species.
The proposed site should be examined to determine predominant
soil type, drainage, amount of daily sunlight or shade, and natural
moisture of the site. Drainage can be checked by using a soil
probe or by simply digging a 1-cubic-foot hole and filling it
with water. When the water has drained, refill the hole, noting
how long it takes the water to drain. A well-drained site will
usually drain in less than an hour. A poorly drained site may
take longer than 6 hours to drain. Slopes should also be checked
for drainage. To avoid problems later, always check site drainage
on each soil type found on the proposed planting site. The type
of drainage found will indicate the type of wildflower garden
that is most suitable for the particular site.
Many Alabamians have heavy, water-holding clay soil. The best
way to improve clay soils so that wildflowers will thrive is to
lighten the soil by adding amendments. Begin by breaking up the
soil with a tiller or a spading fork. Then cover the area with
about 2 inches of coarse sand and, using a spade or shovel, dig
it into the top 8 inches. Next, spread about 4 inches of organic
matter (peat, composted manure, or compost) over the area and
dig this amendment into the soil. This should yield about 12 inches
of good quality garden soil in which your wildflowers can thrive.
After deciding on a location, begin to plan the design you
want for your landscape. Most wildflower gardeners want a "natural
look." Because there are few straight lines or formal beds
in nature, and plants rarely grow at regular intervals, obtaining
a "natural" feel in a wildflower garden requires a different
approach from modern landscaping methods. Some points to keep
in mind include the following:
- Group plants according to their moisture and light requirements.
- Position groups of plants near boulders, trees, stumps, at
bends in a path, or at the corner of an entrance.
- Vary plant sizes (low and medium height plants are usually
planted in groups of 3 or 5, whereas, taller and coarser plants
are planted individually).
To create beds for wildflowers, you should follow certain basic
landscape methods. Annual and perennial wildflower borders can
be any shape to suit the setting and are often situated in front
of a wall, fence, or evergreen hedge. Highlight the flower's blooms
by placing them in front of a darker background.
Another type of bed is known as an island bed. Typically, island
beds are loosely oval or informally shaped and work best set in
an expanse of lawn or in an open area. These beds allow a view
from all sides and from different angles. Wide borders and beds
can accommodate bold grouping of many species. When selecting
flowers to place in the beds, use native perennials that bloom
over a long period and species that bloom in different seasons.
Wildflowers in the Garden
Meadow Garden
Meadow gardens can be dry, upland sites or wet, lowland environments.
Based on studies at Auburn University and the University of Georgia,
several annual and perennial wildflower species have been identified
for use in Alabama. Those listed in Table 3 are particularly suited
to roadsides, pastures, or meadows; these plants offer a wide
range of flower color, growth habit, and leaf texture and color.
Although natural meadows are predominantly grasses, meadow gardens
are large, open areas where islands of wildflowers can be established
in a sea of native grasses. Choosing plants that give a succession
of blooming time will provide color from spring to fall.
Table 3.
Wildflower Species Suitable for Meadow Gardens
| Scientific
Name |
Common
Name |
Type |
Bloom
Season |
Color |
| Achillea
filipendulina |
Fernleaf
Yarrow |
Perennial |
Summer |
Yellow |
| Achillea
millefolium |
Common
Yarrow |
Perennial |
Summer |
White/Red |
| Asclepias
tuberosa |
Butterfly
Weed |
Perennial |
Summer |
Orange |
| Cassia
fasciculata |
Partridge
Pea |
Perennial |
Fall |
Yellow |
| Centaurea
cyanus |
Cornflower |
Annual |
Spring |
Blue |
| Chrysanthemum
leucanthemum |
Oxeye
Daisy |
Perennial |
Spring |
White |
| Coreopsis
lanceolata |
Lance
Coreopsis |
Perennial |
Summer |
Yellow |
| Coreopsis
tinctoria |
Plains
Coreopsis |
Annual |
Summer |
Yellow/Maroon |
| Daucus
carota |
Queen
Anne's Lace |
Biennial |
Spring-Fall |
White |
| Delphinium
ajacis |
Rocket
Larkspur |
Annual- |
|
|
|
|
Perennial(a) |
Spring-Summer |
Mixed |
| Echinacea
purpurea |
Purple
Cornflower |
Perennial |
Summer |
Purple |
| Eschscholzia
californica |
California
Poppy |
Annual |
Spring-Summer |
Yellow/Orange |
| Gaillardia
aristata |
Perennial
Gaillardia |
Perennial(b) |
Summer-Fall |
Yellow/Red |
| Gaillardia
pulchella |
Annual
Gaillardia |
Annual |
Summer-Fall |
Yellow/Red |
| Monarda
citriodora |
Lemon
Mint |
Perennial |
Summer |
Purple |
| Oenothera
speciosa |
Buttercup
Primrose |
Perennial |
Spring-Summer |
Mixed |
| Papaver
rhoeas |
Corn
Poppy |
Annual |
Late
Spring |
Mixed |
| Phlox
drummondii |
Annual
Phlox |
Annual |
Spring-Summer |
Mixed |
| Ratibida
columnaris |
Mexican
Hat |
Perennial |
Summer |
Red/Yellow |
| Rudbeckia
hirta |
Blackeyed
Susan |
Perennial |
Summer-Fall |
Yellow |
| Salvia
coccinea |
Scarlet
Sage |
Perennial |
Summer |
Red |
| Salvia
farinacea |
Blue
Sage |
Perennial(b) |
Summer |
Blue |
| Solidago spp. |
Goldenrod |
Perennial(c) |
Fall |
Yellow |
| Trifolium
incarnatum |
Crimson
Clover |
Annual |
Spring |
Red |
| Verbena
tenuisecta |
Moss
Verbena |
Perennial |
Spring-Fall |
Pink |
(a)Best
results in central and south Alabama may be obtained by starting
from seed in late summer.
(b)Plant may not persist as a perennial in central and south
Alabama.
(c)Goldenrod does not cause hay fever; the culprit is ragweed,
a less noticeable bloomer. |
Wildflowers generally do not require a lot of soil preparation.
Steps to be taken to ensure good results include removing weeds
(either by hand or by an initial herbicide application), the addition
of soil amendments, and an application of a postemergence grass
control, if needed. If noxious weeds are present on the site,
closely mow and carefully rake the area to be planted. An effective
means of killing grass and weeds is by spraying the area to be
planted with a broad-spectrum herbicide such as glyphosate (Roundup).
Refer to the herbicide label for ornamental site preparation.
Do not exceed the rate of 10.6 quarts of glyphosate (Roundup)
per acre per year. You must read all chemical labels completely
before using any pesticide or herbicide. A second herbicide application
may be necessary prior to planting if there is weed regrowth.
If a second herbicide application is applied, wait at least 2
weeks before direct sowing wildflower seeds or planting young
plants.
If you object to the use of herbicides, try soil solarization.
Soil solarization is a method of killing weeds in an area by heating
the soil using sunlight. Cover the soil with black plastic during
the hot summer months. High temperature under the plastic will
germinate weed seeds and kill the seedlings.
If there is no weed regrowth after 2 weeks, lightly cultivate
the soil surface to a depth of one-half to 2 inches. Deeper tilling
brings viable weed seeds to the surface. Organic amendments (peat,
composted manure, or compost) may be tilled into the native soil
at that time to improve soil structure and increase water retention.
If the site is on an erodible slope, a light application of a
low nitrogen fertilizer (for example, 8-8-8) at the seedling stage
will help establish wildflowers and native grasses. If the pH
level is below 5, agricultural limestone should be applied to
the site at the rate recommended by a soil analysis.
Control of weed grasses such as crabgrass or common Bermudagrass
can be accomplished by using a selective postemergence herbicide.
Contact the county Extension office for specific recommendations.
Be sure to read all herbicide label directions prior to using
them in any situation.
The recommended rates for wildflower seed application differ;
therefore, it is best to follow the instructions provided by the
seed supplier. Average rates for a mixed meadow of grasses and
wildflowers are 10 to 15 pounds of native grass seed and 10 to
40 ounces of wildflower seed per acre. For a pure stand of wildflowers,
sow 8 to 12 pounds per acre for most species.
If a small area is to be planted, mix the seeds with damp sand
or similar filler and broadcast them by hand or with a cyclone
seeder. The sand helps to evenly disperse the seed over a larger
area. Generally, use nine parts sand to one part seed. Dry sand
is used in drop or rotary spreaders. Regardless of the seeding
method, lightly rake the area after spreading the seeds to bring
them into good contact with the soil.
After seeding, apply a thin layer of mulch, preferably weed-free
grain straw, pine needles, or composted pine-bark mulch, to conserve
soil moisture and to protect seeds and young seedlings from bird
damage. Avoid using hay mulches that are often infested with weed
seeds.
Some seeds will germinate 10 to 20 days after planting, whereas
other seeds will only germinate in early spring of the following
year. Best germination will be obtained in planting locations
with at least 6 hours of direct sunlight per day, little foot
traffic, and frequent watering if rainfall is not plentiful.
While most wildflowers suitable for meadow gardens are drought
tolerant, water is necessary for germination and proper seedling
establishment. Areas planted in the spring must remain sufficiently
moist for 4 to 6 weeks during seedling germination and establishment.
If rainfall is more plentiful in the fall than in the spring,
fall planting may reduce the need for supplemental watering. Some
seed mixes include both annuals and perennials. Seed germination
of both annuals and perennials is primarily influenced by water
availability and soil temperature. Fall planting allows perennials
to become established for early spring bloom. Also, by sowing
seed in the fall when soil temperatures are below 60 degrees F,
germination of the annuals in the mix will be delayed until the
following spring when soil temperatures rise. Avoid planting wildflowers
during the fall or winter in areas where cool-season grasses (for
example, annual ryegrass or fescues) grow because these grasses
will compete too aggressively with the wildflowers. In Alabama,
fall planting is recommended from late October to mid-November
and spring planting from mid- to late March.
During the first 2 years of establishment, good maintenance
to control weed regrowth is critical to the establishment of a
meadow garden that can later maintain itself without infrequent
mowing. Wildflower sites must be managed to avoid reversion to
natural vegetation.
Once the wildflowers establish, weed control methods are limited
to mowing, hand pulling, and spot spraying with a herbicide. Grassy
weeds such as crabgrass or common Bermudagrass can be sprayed
with postemergence applications of selective grass-control materials.
Contact your local Extension office for specific herbicide recommendations
for your site and read the label before applying any herbicide.
In small areas, handweeding may be the best way to remove noxious
weeds. In larger areas, mowing before weed seeds mature is effective
in controlling weeds. Mow a meadow garden in late summer when
dominant summer-blooming species have begun to fade and before
fall species start to bloom. Late summer mowing may stimulate
some wildflower species into a second bloom cycle. An additional
mowing in midwinter aids in wildflower seed dispersal and controls
the invasion of woody species. For winter mowing, the mower blade
should be set to a height of 4 to 6 inches.
Supplemental watering may also be required during the first
2 years until your wildflower garden is established. Even after
wildflowers have become established, occasional watering during
dry periods will ensure good flower color.
Regular fertilization is usually not needed for wildflower
meadow gardens. Routine fertilization of wildflowers after plants
establish can encourage unwanted weeds and produce plants with
lush foliage and few flowers. Soil test results will indicate
nutrient deficiencies before damage has occurred to plants. On
sloping sites subject to erosion, a light application of a low
nitrogen fertilizer (for example, 8-8-8) will help keep wildflowers
in peak condition.
Experience indicates that meadow gardens change over time as
first one and then another wildflower species dominates. This
is normal and should be expected. However, reseeding annuals may
need a little assistance each year by simply sowing the seed of
those species you particularly enjoy.
Wild Bog Garden
Natural streams, a pond, or just a wet area in the landscape
can be developed to provide special habitats for native stream,
pool, and bog plants (Table 4). A bog contains a mixture of sand
and acidic humus, has groundwater even with or slightly below
the surface, and is characterized by isolated hummocks of moss
on the surface. A carefully controlled source of water such as
a stream or spring diverted to supply a bog is useful for large-scale
bogs; however, bog gardens should not be established on a site
where flooding occurs. Boardwalks placed throughout large bog
gardens increase the viewing area and aid in maintenance.
Table 4.
Wildflower Species Suitable for Bog Gardens
| Scientific
Name |
Common
Name |
Type |
Conditions |
Feature |
| Asclepias
incarnate |
Swamp
Milkweed |
Perennial |
Moist
soil |
Pink
flowers |
| Asclepias
lanceolata |
Milkweed |
Perennial |
Grow
near water |
Red
flowers |
| Betula
nigra |
Swamp
Birch |
Perennial |
Grow
near water |
Peeling
bark |
| Cephalanthus
occidentalis |
Buttonbush |
Perennial |
Grow
near water |
Shrub,
5'-10' |
| Chelone
glabra |
Turtlehead |
Perennial |
Grow
near water |
White
flowers |
| Eupatorium
maculatum |
Joe-Pye
Weed |
Perennial |
Moist
soil |
Purple
flowers |
| Eupatorium
purpureum |
Sweet
Joe-Pye Weed |
Perennial |
Moist
soil |
Vanilla
fragrance of dried leaves and stems |
| Helenium
autumnale |
Sneezeweed |
Perennial |
Moist
soil |
Yellow
flowers |
| Illicium
floridanum |
Anise
Bush |
Perennial |
Moist
soil |
Evergreen
shrub |
| Iris
versicolor |
Wild
Blue Flag |
Perennial |
Grow
near water |
Stems
to 3' |
| Lilium spp. |
Lilies |
Perennial |
Moist
soil |
Many
species |
| Lobelia
cardinalis |
Cardinal
Flower |
Perennial |
Moist-wet
soil |
Red
flowers |
| Lobelia
siphilitica |
Great
Blue Lobelia |
Perennial |
Moist-wet
soil |
Stems,
2'-5' |
| Nuphar
luteum |
Yellow
Pond Lily |
Perennial |
Aquatic |
Small
yellow flowers, 1-1/2" |
| Nymphaea
odorata |
Fragrant
Water Lily |
Perennial |
Aquatic |
White very fragrant flowers, 4" |
| Monarda
didyma |
Scarlet
Beebalm |
Perennial |
Moist
soil |
Showy
flowers |
| Orontium
aquaticum |
Golden
Club |
Perennial |
Acid,
moist bog |
Difficult
to grow |
| Physostegia
virginiana |
False
Dragonhead |
Perennial |
Moist-wet
soil |
Pink
flower spikes |
| Sagittaria
falcata |
Arrowhead |
Perennial |
Grow
near water |
White
flowers |
| Symplocarpus
foetidus |
Skunk
Cabbage |
Perennial |
Moist
soil |
Purple/Green
Foliage |
| Typha
latifolia |
Common
Cattail |
Perennial |
Grow
near water |
Brown
flower heads |
| Typha
angustifolia |
Common
Cattail |
Perennial |
Grow
near water |
Narrow
leaves |
| Xyris
baldwiniana |
Yellow-Eyed
Grass |
Perennial |
Grow
near water |
Yellow
flowers |
In a natural wet spot, excavate the wettest area by hand or
by using a backhoe. This central basin will collect and hold water.
Create habitats for wetland plants by piling excavated soil around
the pool edges. Plant along the banks of naturally occurring streams
to create a wetland garden area. If you do not have a stream on
your site, try piping water to the garden to create a pool, a
cascade, or other water feature. Cascading water can often mask
undesirable noises that intrude into the landscape and invite
birds and small animals into the garden.
If the site contains a pond, aquatic weeds such as reed canarygrass
should be removed from the pond. Unicellular algae will foul pond
water; an algicide will temporarily control the problem, but grasses
and water lilies can be more effective. Once the pond water has
cleared, add small fish to control mosquitoes.
If you do not have a wet area, a small bog may be constructed
by lining a 12- to 18-inch deep by 3- to 6-foot wide depression
with tar paper, finishing with two sheets of a heavy mill polyethylene.
Place rocks as naturally as possible around the edges of the plastic.
Next, fill the depression with a 1:2:3 (soil:sand:peat) mixture.
Saturate the mix completely. Divert water or use drip irrigation
to keep the area wet. Finally, plant the area with wildflower
species native to bog habitats.
Wetland plants range from those species that grow submerged
in water to those that grow in occasionally flooded, saturated
soil to those species that grow in moist soil but do not tolerate
flooding. Wetland soils are usually classified as peat (undecomposed
organic material), muck (decomposed organic material), or mineral
(mostly sand, silt, and clay). Arrange plants with similar cultural
needs together.
Seeds may be broadcast on moist ground. The resulting plants
may be transplanted into pockets of soil that have been enriched
with organic amendments. Plants should only be set at the depth
they were originally grown in the container or ground. After planting,
place a 2- to 4-inch layer of mulch around the plants. Aquatic
plants may be planted in shallow water by setting the plants in
the bottom mud and then placing stones over the root ball to prevent
the plant from floating. If an aquatic species is known to be
invasive, it may be kept in bounds by placing it in a container.
Good garden soil should be used (not soilless potting mix) because
the weight will help hold the container in place. Place gravel
on top of the soil to add additional weight and to prevent the
soil from washing out of the container. Just like terrestrial
plants, aquatic plants have planting depth requirements. When
using aquatic plants in containers, the height of a container
can be adjusted by placing the container on bricks or stones set
into the pond bottom. But if the water depth fluctuates, adjust
the height of the container so that the plant remains at the proper
depth.
Maintenance of a bog garden includes hand pulling weeds, mulching,
dividing some species that have grown too large for the area,
and adding composted organic material to maintain the necessary
soil fertility and pH. In bog gardens with only a moderate water
supply, supplemental water may be necessary during periods of
drought.
Natural Woodland Garden
Woodland landscapes are a great way to attract wildlife (including
deer, insects, birds, and shy, ground- and tree-dwelling animals)
to a property. To attract the largest number of wildlife species:
- Choose appropriate trees and shrubs to provide nesting and
shelter for nearby wildlife.
- Choose a wide range of annual and perennial wildflowers for
extended bloom time and nectar and seed production.
- Avoid chemical pesticides that may damage insect populations.
- Arrange trees and shrubs to lead shy wildlife close to the
house or patio for viewing.
- Supplement food plants and nesting areas with feeding stations
and nest boxes.
- Supplement water supply for wildlife during droughts.
In the woodland landscape, tree canopies don't quite touch,
and there is room and light beneath the dominant trees for understory
trees and shrubs and a ground cover of flowers, ferns, and mosses.
Spring-flowering wildflowers are able to flower and form seed
before the tree canopies develop and limit light. Weed species
do not compete well here. In developing a woodland garden, you
should allow each plant enough room to attain its mature size.
Many wildflowers are suited to the woodland setting. Choose the
basic overstory trees, understory trees, and shrubs first. Then
fill in the details with native annual and perennial wildflowers
(Table 5).
Table 5. Wildflowers Suitable for Woodland
Gardens
| Scientific
Name |
Common
Name |
Habit |
Size |
Light |
Soil |
Notes |
| Acer
barbatum |
Florida
Maple |
T |
60' |
S |
M |
Fall
color |
| Acer
rubrum |
Red
Maple |
T |
60'-90' |
S |
M |
Fall
color |
| Acer
leucoderme |
Chalk
Maple |
T |
30' |
S,
SP |
M |
White
bark |
| Adiantum
pedatum |
Maidenhair
Fern |
P |
18" |
Sh |
M |
Alkaline
soil |
| Amelanchier
arborea |
Downy
Serviceberry |
S,
T |
40' |
S,
SP |
M |
Showy
flowers |
| Anemonella
thalictroides |
Rue
Anemone |
HP |
4"-6" |
Sh |
M,
HF |
Delicate
white flowers |
| Aquilegia
canadensis |
Wild
Columbine |
HP |
1"-3" |
S,
Sh |
M |
Calcareous
soils |
| Aristolochia
macrophylla |
Dutchman's-Pipe
Vine |
V |
15'-20' |
Sh |
M,
HF |
Woody
vine |
| Asarum
canadense |
Wild
Ginger |
HP |
3"-5" |
Sh |
M |
Invasive |
| Asimina
triloba |
Pawpaw |
S,
T |
30' |
S,
P |
M |
Wildlife
food |
| Asplenium
platyneuron |
Ebony
spleenwort |
P |
12"-18" |
Sh |
M,
N |
Evergreen |
| Athyrium
Filix-femina |
Lady
Fern |
P |
18"-24" |
Sh |
M |
Neutral
soil |
| Callicarpa
americana |
American
Beautyberry |
S |
|
S,
PS |
M |
Rose
berries |
| Calycanthus
floridus |
Sweet
Shrub |
S |
5'-10' |
S,
Sh |
M |
Fragrant
flowers |
| Cercis
canadensis |
Redbud |
T |
25'-30' |
S,
Sh |
M,
HF |
Early
bloom |
| Cocculus
carolinus |
Carolina
Moonseed |
V |
15'-20' |
S,
PS |
M |
Red
fruit |
| Cornus
florida |
Flowering
Dogwood |
T |
25'-40' |
S,
PS |
M |
Flowers |
| Clematis
virginiana |
Clematis |
V |
15'-20' |
S,
PS |
M |
White
flowers |
| Cypripedium
calceolus |
Yellow
Lady's-Slipper |
HP |
12"-18" |
Sh |
M,
HF |
Native
orchid |
| Cyrtomium
falcatum |
Holly
Fern |
P |
1'-2' |
Sh |
M,
N |
Evergreen |
| Dicentra
Cucullaria |
Dutchman's
Breeches |
HP |
12"-18" |
Sh |
M,
HF |
Delicate |
| Dryopteris
marginalis |
Marginal-Shield
Fern |
P |
2' |
Sh |
M,
A |
Evergreen |
| Fagus
grandifolia |
American
Beech |
T |
60'-80' |
S |
M,
HF |
Wildlife
food |
| Fraxinus
americana |
White
Ash |
T |
80' |
S |
M,
HF |
Fall
color |
| Galax
aphylla |
Wandflower |
HP |
10"-20" |
Sh |
M |
Rocky
woodlands |
| Geranium
maculatum |
Wild
Geranium |
HP |
1'-2' |
S,
Sh |
M |
Rose
flowers |
| Hamamelis
virginiana |
Witch
Hazel |
S,
T |
20'-30' |
PS |
M |
Fall
color |
| Hexastylis
arifolia |
Heartleaf
Wild Ginger |
HP |
3"-5" |
Sh |
M |
Groundcover |
| Hexastylis
minor |
Wild
Ginger |
HP |
3"-5" |
Sh |
M,
HF |
Groundcover |
| Ilex
cassine |
Dahoon
Holly |
S,
T |
30' |
S,
PS |
M |
Evergreen |
| Ilex
decidua |
Possumhaw |
S,
T |
20' |
S,
PS |
M |
Wildlife
food |
| Ilex
vomitoria |
Yaupon |
S,
T |
20' |
S,
PS |
M |
Evergreen |
| Iris
verna |
Dwarf
Iris |
HP |
4"-5" |
S,
PS |
M,
A |
Fragrant |
| Juniperus
virginiana |
Eastern
Red Cedar |
T |
40'-60' |
S |
LF |
Limestone
soils |
| Kalmia
latifolia |
Mountain
Laurel |
S,
T |
10'-15' |
Sh |
M,
A |
Pink
flowers |
| Mitchella
repens |
Partridge
Berry |
P |
2"-3" |
Sh |
M,
HF |
Forms
dense mat |
| Osmunda
regalis |
Royal
Fern |
HP |
4' |
Sh |
M,
A |
Background |
| Oxydendrum
arboreum |
Sourwood |
T |
50' |
S,
Sh |
M |
Attractive |
| Pinus
elliottii |
Slash
Pine |
T |
60'-100' |
S |
M |
Swamp
to upland |
| Pinus
taeda |
Loblolly
Pine |
T |
80'-100' |
S |
M |
Flood
plains to upland |
| Pinus
virginiana |
Virginia
Pine |
T |
30'-60' |
S |
LF |
Well-drained
sites |
| Polystichum
acrostichoides |
Christmas
Fern |
P |
18" |
Sh |
N |
Evergreen |
| Quercus
alba |
White
Oak |
T |
80'-100' |
S |
M |
Slow
growing |
| Quercus
phellos |
Willow
Oak |
T |
50'-80' |
S |
M |
Shallow
roots |
| Rhododendron
alabamense |
Alabama
Azalea |
S |
5'-10' |
Sh |
M,
HF |
White
flowers |
| Rhododendron
canescens |
Wild
Honeysuckle |
S |
5'-10' |
Sh |
M,
HF |
Pink
flowers |
| Thelypteris
kunthii |
Southern
Shield Fern |
HP |
3'-5' |
Sh |
M |
Alkaline
soil |
| Trillium spp. |
Trillium
species |
HP |
3"-10" |
Sh |
M |
Early
blooms |
| Viola
papilionacea |
Common
Blue Violet |
HP |
4"-6" |
Sh |
MF |
Blue
flowers |
Key:
Habit
H = Herbaceous
T = Tree
S = Shrub
V = Vine
P = Perennial |
Light
S = Full Sun
Sh = Full Shade
PS = Partial Sun
PSh = Partial Shade |
Soil
M = Moist
LF = Low fertility
HF = High fertility
A = Acidic
N = Neutral |
For the woodland garden, clay and sandy soil types should be
amended with 6 to 12 inches of humus, compost, or peat moss that
is incorporated to a depth of 12 to 18 inches. This will aid in
developing a moist, well-drained soil. Usually, a slightly acidic
soil is desired for most woodland gardens in Alabama. Drainage
is important to many woodland wildflowers. On sites with marginal
drainage, planting in berms (raised beds) constructed from native
soil incorporated with organic amendment allows naturalized areas
within the landscape.
Planting time for the woodland garden is from early to midspring
or fall. If transplanting, move the plants when they are dormant
or inactive. Late summer- and fall-blooming plants are best moved
in early spring. When planting near trees, dig large holes and
remove all tree roots from the holes so that the wildflowers can
become established without competition for water and nutrients.
Refill the holes with native soil that is amended with organic
amendments in a mixture of two-thirds soil to one-third amendment.
In heavy clay soils, score the sides of the hole so that the plant's
roots will grow into the native soil. Mulch all new plantings
with a generous 2- to 4-inch layer of leaf litter, pine needles,
pine bark nuggets, composted pine bark mulch, or aged wood chips
to protect them from extremes of heat, cold, and drought.
Removing weeds and adding mulch are two basic maintenance tasks
in the woodland garden. Watering during periods of prolonged drought
may be required, especially in the first several years after planting.
Some forest perennials will require division every few years to
continue to flourish; this should be done in the spring. An application
of fertilizer (for example, 8-8-8 or 16-0-16) each spring will
help establish the plants. Ferns, especially, require a very acid
soil. The addition of an acidic organic material such as peat
moss is beneficial to many fern species. Acid-loving plants should
be fertilized with an acidic fertilizer.
Considerations for Commercial Uses
Installation, establishment, and maintenance of wildflower
areas in residential and commercial landscapes are similar in
most instances. However, for those performing installation and
maintenance of landscapes containing native wildflowers, there
are some special considerations. The needs of each individual
client must be considered. Find out what the client expects from
the landscape each season. Does the client expect a floral display
focusing on color each season--pansies in winter and spring, marigolds
and salvia in summer, and chrysanthemums in fall? Is a neat, manicured
landscape with plants within set boundaries desired? If the answers
are yes, then a mixed border incorporating wildflowers is probably
not for your client. But, for those clients with a different perspective
on flower and foliage color, texture, variety, and form, a landscape
incorporating wildflowers in mixed borders and naturalized areas
within a setting of native trees and shrubs may be more suitable.
A commonly installed landscape feature is an annual bed or
border that is changed as seasons change. An alternative to this
could be a mixed border of annuals and perennials that also contain
native wildflowers. However, a mixed border that uses wildflowers
has installation and maintenance requirements that are different
from those of an annual bed or border.
Many perennials and biennials bloom only once during a period
of 3 to 6 weeks; therefore, border plantings containing wildflowers
may not always be at their peak. However, they will offer the
client spectacular displays at 3- to 4-week intervals. The larger
varieties of cultivated annuals (begonia, impatiens), chosen for
color, habit of growth, and bloom period, blend well in the mixed
border; their lush growth quickly fills the open space and can
be effective when the less numerous perennials are not blooming.
Some annual wildflowers are self-seeding and may only require
an initial sowing to become established. For these types, seed
heads must be allowed to dry for seed dispersal the following
year. For those commercial and residential clients who do not
like the seed heads, remove the seed heads, but add the cost of
reseeding those annual wildflowers the following year.
Maintenance costs for sunny annual borders and mixed borders
may be more expensive than for shady borders and annuals alone.
Plan for replanting a percentage of the plants. Generally, a mixed
border should contain approximately 55 to 65 percent annual filler
flowers to 35 to 45 p |