crab grass - Knowledgebase Question

Danville, Il
Question by cathy_hamilt
August 5, 2009
I have read your articles on killing crab grass. We keep putting product on the lawn and it hardly kills it. Should we use a powder form with a sreader, liquid, there are so many different ones and we have tried a bunch with no luck. It is still smiling at us in our lawn. Are you allowed to give us actual suggestions of brand names to use that you know work well. We are so flustered over this

Answer from NGA
August 5, 2009


Crabgrass is really difficult to eradicate once it is up and growing. Any chemical that will kill crabgrass will also kill your lawn. Hand digging is the best way to eliminate it in the summer months, but that doesn't sound too practical in your situation. Since crabgrass is an annual, it will die out when the weather cools down. At that time I would rake it out of the lawn and then overseed to cover any bare areas. If you treat your lawn with a pre-emergent in the early spring, the seeds the crabgrass left behind won't germinate and next year your lawn should be crabgrass-free. I use Preen 15,000 Lawn Broadleaf Weed Control on my lawn as a pre emergent. When shrubs and trees are beginning to flower, I apply it in amounts as listed on the label. Your best defense against weeds is a thick, healthy lawn so be sure to water and mow regularly and put your lawn on a regular feeding schedule to keep it lush and thick. Best wishes with your lawn!

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