“When soil temperatures consistently measure 65 degrees (F) at the 4″ depth and are trending upwards, it’s time to fertilize warm-season turf,” says Dr. Clint Waltz, UGA Turfgrass Extension Specialist. Resisting the temptation to fertilize warm-season turf too early in the season not only conserves valuable time and resources, but encourages a healthy competitive lawn. Spring season air temperatures often fluctuate from lows in the mid 40’s to highs in the mid 70’s, resulting in wide swings in soil temperature. The best time to fertilize warm-season turfgrasses such as bermudagrass, zoysiagrass, St. Augustinegrass, and centipedegrass is during the active growth season spanning May through August when air temperatures reach highs in the mid 80’s to 90’s and soil temperatures remain well above 65 degrees.
Dr. Clint Waltz, Extension Turfgrass Specialist with the University of Georgia, reports that hot temperatures and low rainfall in the fall of 2016 likely sent warm-season turfgrasses into winter dormancy with depleted carbohydrate reserves. During “normal” circumstances warm-season turfgrasses accumulate and store carbohydrates from late summer through early fall. Last … Read more