ACES Publications

Author: Joe Kemble, Mary Beth Musgrove
PubID: ANR-1061
Title: Horticulture Notes: Soil Temperature Conditions for Vegetable Seed Germination
Pages: 1     Balance: 0
ANR-1061 Horticulture Notes: Soil Temperature Conditions for Vegetable Seed Germination

Horticulture Notes: Soil Temperature Conditions for Vegetable Seed Germination

ANR-1061 Reprinted June 2006. Joseph Kemble, Extension Horticulturist, Associate Professor, Horticulture, Auburn University; and Mary Beth Musgrove, former Extension Associate.

Vegetable Min (F) Optimum Range (F) Optimum (F) Max (F)

Asparagus 50 60-85 75 95
Bean 60 60-85 80 95
Bean, Lima 60 65-85 85 85
Beet 40 50-85 85 85
Cabbage 40 45-95 85 100
Carrot 40 45-85 80 95
Cauliflower 40 45-85 80 100
Celery 40 60-70 70 85
Chard, Swiss 40 50-85 85 95
Corn 50 60-95 95 105
Cucumber 60 60-95 95 105
Eggplant 60 75-90 85 95
Lettuce 35 40-80 75 85
Muskmelon 60 75-95 90 100
Okra 60 70-95 95 105
Onion 35 50-95 75 95
Parsley 40 50-85 75 90
Parsnip 35 50-70 65 85
Pea 40 40-75 75 85
Pepper 60 65-95 85 95
Pumpkin 60 70-90 90 100
Radish 40 45-90 85 95
Spinach 35 45-75 70 85
Squash 60 70-95 95 100
Tomato 50 70-95 85 95
Turnip 40 60-105 85 105
Watermelon 60 70-95 95 105

Soil temperatures should be taken by inserting a soil thermometer 3 to 4 inches deep into the soil surface and noting temperature. Soil thermometers are available from garden centers, feed and seed stores, and from many garden supply catalogs. Soil temperatures should be consistent for several days before seeds are sown to ensure that the seeds are being exposed to optimal temperatures for germination.


For more information, contact your county Extension office. Visit http://www.aces.edu/counties or look in your telephone directory under your county's name to find contact information.


Published by the Alabama Cooperative Extension System (Alabama A&M University and Auburn University), an equal opportunity educator and employer.


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