Answer: Crabgrass is easier to prevent than to control once it gets a foothold in your bermuda grass lawn. To prevent winter weeds like poa annua, apply a crabgrass preventer to your Bermuda lawn in late September or early October. Apply it again in February to prevent crabgrass and certain other broadleaf weeds. A healthy, well-fed Bermuda lawn rarely has a weed problem. If weeds do develop, apply a lawn weed killer in June to control growing weeds.
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