Crabgrass Taking Over - Knowledgebase Question

Vacaville, AB
Question by weister
May 16, 2000
I have tried lots of different ways to kill crabgrass but it still comes back in our periwinkle ground cover and travels all over our yard, and into our flowers & vegetables. What can I do?


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Answer from NGA
May 16, 2000

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This is the type of situation where an ounce of prevention is worth several pounds of cure. It's easier to keep weeds and grasses out of the garden than to get them out once they've established themselves. The safest treatment is to dig the weeds and grass out. Crabgrass is an annual that begins to sprout about the time the forsythia blooms, so one of the best controls is to either cultivate the soil lightly to disturb those seeds (lightly so you don't bring more seeds up near the surface where they'll germinate, too) or to use a layer of mulch to smother them. Another option is to use corn gluten as an herbicide. The gluten releases an enzyme that kills germinating seeds, and at the same time adds nitrogen to your soil.

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