The Q&A Archives: Crabgrass Control

Question: I was at Home Depot today buying crabgrass control seeds and weed and feed for my lawn. One of the associates was explaining the time to spread these items for the best results. She said the crabgrass control should be applied twice a season for maximum results. I know one of those times is right now, but can't remember when she said to throw down the second application. I believe she also said that the weed and feed should be applied at the end of may, beginning of June. Is this correct?

Answer: Crabgrass starts germinating when soil temperatures are 50 to 55 degrees F for ten or more days and germination can take place over 6 weeks. Pre-emergence herbicides provide excellent weed control for crabgrass. The compound doesn't prevent the weed seed from germinating, but kills the newly sprouted seedling. Late April to early May is an ideal time to apply pre-emergence control. Proper lawn maintenance practices limit crabgrass invasions. A dense stand of turfgrass prevents the weed from germinating and establishing. Fertilize at the end of May and remember that fall fertilizing, overseeding, aeration and thatch control can limit spring problems. Best wishes with your lawn.

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