Which statement best describes potassium's role in turfgrass?

• A. Important for disease resistance.
• B. Important for rooting and improves turfgrass tolerance to climatic stress.
• C. Not essential.
• D. Mostly influences seed production.

Answer: (B)

Potassium helps turfgrass manage water and energy, which shows up most clearly as stronger root growth and greater tolerance to environmental stress. A robust root system lets the grass explore more soil for water and nutrients, supporting better establishment and recovery after drought, heat, cold, or salinity stress. While good vigor from potassium can aid overall health and may contribute indirectly to disease resistance, its primary, direct roles are promoting rooting and improving climatic-stress tolerance, not seed production. Potassium is an essential nutrient, so it isn’t “not essential.” That makes rooting and stress tolerance the best description of its role in turfgrass.