Getting Rid of Crabgrass Baltimore MD

How can I get rid of crabgrass in my lawn#f3#? It was awful all last summer. Is there something I can do in spring to fend it off? If this question also bothers you, you can read on to find the solution.

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Randallstown, MD
 
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Getting Rid of Crabgrass

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How can I get rid of crabgrass in my lawn? It was awful all last summer. Is there something I can do in spring to fend it off?



Answer: Crabgrass (Digitaria spp.) is a common invader of lawns across North America. Crabgrass is a composite of several species, all of which are opportunistic, colonizing open spots in the lawn where the soil is bare, compacted or otherwise disturbed. The coarse texture and prostrate habit of the plants make this grass especially unappealing to those seeking perfect turf.



Crabgrass is a sun-loving summer annual. It is tolerant of dry, poor soil and occurs in nearly every soil type and crop or landscape. Seed germination begins in spring, but it may continue throughout the growing season. The spreading stems bear coarse, often hairy leaves and can root at their nodes. Flowers and seed are borne in multiple spikes atop wiry stems. The plants are killed by the first frost in fall, leaving great quantities of seed for the next year. Crabgrass is particularly conspicuous in autumn, when frost-killed plants make brown patches in an otherwise green lawn.



Control: Even repeated close mowing will not stop crabgrass from reseeding. Pre-emergent herbicides, however, will prevent the seed from germinating. These typically include pendimethalin, bensulide, benefin and trifluralin, among others. Corn gluten is an organic herbicide alternative that has shown some ability to suppress crabgrass germination.



It is important to apply pre-emergent herbicides at the right time. The exact date will vary by region and even from year to year, but it is typically when the forsythia in your area is in bloom. Depending on your location, a second application may be necessary as the first loses its potency. Reapplication times will vary according to your soil type and rainfall. Check with your local experts for specifics.

Finally, because crabgrass is intolerant of shade, maintaining a vigorous stand of the desired turf grass through proper mowing, fertilization and soil care is the best defense against the opportunistic invader.



Read about other weeds, pests and diseases

From Horticulture Magazine