crab grass - Knowledgebase Question

Wood River, Il
Question by jthien1951
June 26, 2009
what is the best and safest way to get rid of grab grass. I want it out of my flower beds. I have pulled and mulched and I can't get it under control. Please help.


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Answer from NGA
June 26, 2009

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Crabgrass can be difficult to control because it develops so many seeds and those seeds can remain viable for 3 or more years. So, pulling or killing the existing crabgrass will remove it from the garden temporarily, but the seeds it leaves behind will sprout and sprout and sprout. I think the best way to eliminate it is to remove your plants, pull the crabgrass out and then lay weed barrier landscape fabric over the bed. Then you can cut holes in the fabric to plant your perennials. Or, if you're careful, you can spray or brush a weed killer such as Round Up on the crabgrass - keeping it away from your perennials - and when the weeds are dead pull them out of the bed. Then broadcast a pre emergence product with a corn gluten base (Preen or Casoron, for instance) to keep crabgrass seeds from germinating. There's really no easy way to control crabgrass but the above one-two punch should help. Best wishes with your flower beds.

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