Howard from Plano, Tx writes
Pre-emergents, such as Hi-Yield Crabgrass Weed Control, should be applied when the soil temperature reaches 55 degrees Fahrenheit in the spring and before it falls below 55 degrees Fahrenheit in the fall months. You will use 2.25 - 3.5 lbs. per 1,000 sq. ft. in late winter or early spring. Please check out our Warm Season Lawn Schedule for information on when products should be applied throughout the year.
Answer last updated on: 10/28/2016