Organic Crabgrass control and fertilizer - Knowledgebase Question

durham, Co
Avatar for cwilde63
Question by cwilde63
March 11, 2010
I live in CT, what is the best time to put down Organic preemergent crabgrass control. I've put it down early spring(end of March) and also tried end of April before the forsythia drops its blooms but still get a huge amount of crabgrass. What kind do you recommend?

Answer from NGA
March 11, 2010
Timing is everything when it comes to 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. 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 seedling. I'd apply it in mid-March and then make a second application in mid-April. CONCERN Weed Prevention Plus is 100 per cent natural corn gluten meal so give this one a try. Hope it works well for you!

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