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NaturaLawn® of America, Inc. The Leader In Organic-Based Lawn Care®

How to Get Rid of Crabgrass

Original Publication Date:

You can kill crabgrass and prevent crabgrass from taking hold or spreading in your lawn. Learn how to get rid of crabgrass from the lawn care experts at NaturaLawn of America. Read on.

The arrival of springtime means budding flowers, blossoming trees, and green grass. Unfortunately, with this abundance of new growth comes sprouting weeds as well. Crabgrass in particular is a weed that continues to frustrate homeowners year after year. By knowing how a weed grows and a few tips on natural prevention, you'll know what you can do about crabgrass without chemicals.

What Is Crabgrass?

Crabgrass is one of many broadleaf weeds that are distinguished by their wider blades when compared to lawn grasses. Crabgrass is also an annual weed whose seeds germinate during spring and summer. Germination begins when soil temperatures reach 55°- 65°F at a 3" depth for 5 consecutive days. Un-germinated crabgrass seeds can wait in the soil for up to thirty years before sprouting. Given the fact that a single crabgrass plant can produce 150,000 crabgrass seeds during the growing season, it's easy to see why controlling it is difficult.

Why Do I Have So Much Crabgrass?

Crabgrass favors sandy, compacted soil where the grass is in a weakened, thinned condition. Bare, thin lawns allow sunlight to directly hit the soil, which is an ideal condition for crabgrass germination. Remember, crabgrass seeds favor soil temperatures between 55° and 65°F. In addition, weeds like crabgrass thrive when your lawn has excess water and phosphorus levels. Learn more about summertime weed control from our experts.

How Can I Prevent Crabgrass?

The key to crabgrass prevention is to stack the playing field in favor of your grass; in other words, give it ideal growing conditions, and your grass will choke out weeds. Of course, you can make all the conditions favorable for turf-grass, but you also need to ensure you have the correct turf grass for your area. For example, bluegrass is a cool-season grass best suited for the northern US and won't thrive in southern states.

Providing ideal growing conditions for your grass is very important and can be accomplished in most cases with simple cultural practices.

Mowing Practices to Get Rid of Crabgrass

First, adjust your mower's height to allow your grass to grow to its optimal level. The higher your grass is above ground, the longer the roots are underground; this means less room for anything else to take root. Try mowing at three inches or higher. The taller grass blades provide shade that keeps the soil cooler and less hospitable for crabgrass seeds to germinate.

Aeration and Overseeding to Get Rid of Crabgrass

Second, aeration and overseeding can also decrease the presence of crabgrass, because it adds grass seed and favorable conditions to your lawn.

Fertilizing to Get Rid of Crabgrass

Lastly, ensure your lawn's soil has the proper amounts of nutrients via a simple soil test. Soil testing will help you determine what compounds and nutrients your lawn is lacking so you can fortify your lawn with a natural fertilizer, which will correct any inequities.

How Can I Kill Crabgrass with Natural Lawn Care?

Don't give up if you've tried all the cultural practices and natural crabgrass controls we recommended above. If crabgrass is still giving you a headache — you still have options. First, you can apply a pre-emergent fertilizer before the germination period to organically control crabgrass. If it is mid-summer and the crabgrass is already fully grown, you can wait it out and then attack in full force next season or treat it with an herbicide specifically labeled for crabgrass control. Spraying herbicidal weed control is always a last-ditch effort and should be done so with care. When using any type of control materials always follow label directions, and only spray the troublesome areas as opposed to treating your entire lawn.

You can control crabgrass with a pre-emergent or post-emergent herbicide. We advocate getting rid of crabgrass by chemical-free cultural practices. Knowing how the plant grows is key. Crabgrass is a broadleaf weed that thrives in specific soil temperatures and conditions. With this knowledge in hand, eliminating crabgrass is a matter of disrupting the conditions that the plant favors. You can achieve a healthy lawn free of crabgrass through diligent mowing, aeration & seeding, and fertilizing.

If you would like assistance with removing crabgrass from your yard, contact a local natural lawn care professional. NaturaLawn of America has provided homeowners with safer and effective, organic-based lawn care since 1987.

What Is Crabgrass?
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How to get rid of crabgrass without chemicals – Best way to control crabgrass