What are plant growth regulators in turf management?

• A. Watering devices
• B. Pesticides
• C. Chemicals that modulate growth patterns
• D. Soil amendments

Answer: (C)

Plant growth regulators are chemicals that modulate how turf grasses grow. They work by altering plant hormones—most notably gibberellins—so the stems don’t lengthen as much. The result is a more compact, uniform canopy, slower shoot growth, and often reduced mowing frequency, which helps with turf quality and maintenance. They’re specialized tools for growth control, not water delivery systems, pest control products, or amendments that change soil properties. In practice, these regulators are used to keep turf thicker and flatter, improving playability and wear tolerance without relying on constant mowing.