Lawn Care - Knowledgebase Question

Rocky Hill, Co
Question by gsparveri
March 17, 2010
When is the best time to spread crabgrass killer and fertilizer and what is the best product for these applications?


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Answer from NGA
March 17, 2010

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Crabgrass starts germinating when soil temperatures are 50 to 55 degrees F for ten or more days and germination can take place over a 6 week period. Pre-emergence herbicides provide excellent weed control for crabgrass but they last only about 30 days. The compound prevents the weed seed from germinating, but it will not kill the newly sprouted seedlings. Late March to early April is an ideal time to apply pre-emergence controls. Scott?s Turf Builder with Halts contains a crabgrass pre emergent but there are other brands on the market. Good luck with your lawn.

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