What is the best time to put down crabgrass preventer?
Please give other hints for reducing this lawn weed in my fescue lawn. A: Apply the first crabgrass preventer of the lawn season when the soil and air are warming up enough to make crabgrass seeds germinate. A good signal of this time is heavy blooming of forsythias. Look on the product label to see if additional future applications are suggested. Some crabgrass preventers loose their strength several weeks after application and require another application in 6 weeks. Short mowing encourages crabgrass, so be sure that your mower is set at 2-1/2 inches or slightly higher for your fescue. Excessive watering either by sprinklers we control or rains that we don’t control can leach preventer down lower than the ½ inch depth where it is needed.
