Initially introduced to the market in the 1970s, plant growth regulators (PGRs) have proven a practical cotton plant canopy and size management tool for producers.

Alabama Cooperative Extension System Cotton Specialist, Steve Brown, said there is not an exact recipe for PGR application and timing; producers must adjust as the season unfolds.

Factors to consider include:

• Current and forecasted weather
• Cotton variety
• Fertility
• Irrigation
• Field history
• Fruit retention
• Presence or absence of crop injury
• Calendar date
• Row pattern