fertilizing - Knowledgebase Question

East bethel, Mi
Question by tal378
March 31, 2010
Im in the 55011 zip code, zone 4, is it too early to put down scotts halts and also to turn on my sprinkler system?

Answer from NGA
March 31, 2010


Your average last frost date isn't until late May so I think it's too early to apply a pre-emergent to your lawn. Crabgrass won't start germinating until 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 the newly sprouted seedlings. Watch the weather - late April to early May is an ideal time to apply pre-emergence control in your region. When your lawn starts greening up in the spring you can turn on your sprinkler system. Best wishes with your lawn.

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