|Is it to late to use the Scotts crabgrass treatment or should I move on to step two (weed and feed)? dandilions are already coming up all over the yard
|Answer from NGA
April 19, 2010
|I'm not convinced it's too late for crabgrass control. 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. The compound prevents the weed seed from germinating, but it will not kill any newly sprouted seedlings. Although you should watch the weather - late April to early May is an ideal time to apply pre-emergence control in your gardening region.
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