Crab grass - Knowledgebase Question

Farmingville, Ne
Avatar for theboat4
Question by theboat4
September 12, 2010
i always had a beautiful lawn, but this year we have crab grass in many areas. How do we get rid of crab grass?

Answer from NGA
September 12, 2010
How annoying! The good news is that crabgrass is an annual weed and will die out when the weather cools. The bad news is that even if you pull it out by the roots, it will leave seeds in the soil which will try to sprout next spring. Crabgrass starts germinating when soil temperatures are 50 to 55 degrees F for ten or more days and germination can take place over a 6 week period. Pre-emergence herbicides provide excellent weed control for crabgrass. The compound prevents the weed seed from germinating, but it will not kill the newly sprouted seedlings. Late March to early April is an ideal time to apply pre-emergence control in your region, but watch the weather patterns and apply sooner if the weather warrents. At this point, you might want to try raking it out or hand pulling. Depending upon the type of turfgrass you are growing, there are some products that specifically target crabgrass but not some types of turfgrass. If you use one of these products, make sure your grass type is listed on the label. Next spring use the pre-emergent. That should keep the crabgrass under control. Best wishes with your lawn.

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