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Don't put fertilizer with crabcrass preventer (Halts) down until 1st or 2nd week of May! I have done this for over 20 yrs and have no crabgrass in my lawn. Crabgrass doesn't sprout until ground temp reaches about 65dF plus the barrier only last 90 days, so if you put it too early you will have late season problems. Additionally the Halts chemical barrier should not be broken, i.e. by raking!
Put down a general fertilizer now to get lawn going and Halts in about 6 weeks. I buy 2 bags of Scotts Winterizer: one for Fall and one for Spring. Mine went down 3 weeks ago!
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