Organic Methods for Controlling Crabgrass in Your Lawn

Crabgrass is a common warm-season annual that’s a member of the grass family. The problem is that most people don’t think of it as a grass and want it gone! There are two primary species of crabgrass: the large or hairy crabgrass (Digitaria sanguinalis) and small or smooth crabgrass (Digitaria ischaemum). Chances are you have one or both.

Why Does Crabgrass Thrive?

There’s a reason you probably can’t keep up with crabgrass spreading in your yard. It’s one of the most persistent weeds around and a prolific seed spreader. The University of Minnesota Extension Service explains that crabgrass survives harsh conditions through its abundant tillering (creation of shoots other than the main shoot) and seed production. Its structure allows up to 150,000 seeds per plant to be produced in a single season. It’s no wonder it’s hard to keep it under control.

The UMASS Extension Center states that crabgrass seeds germinate best from early spring to late summer. And it continues to grow until midsummer when days become shorter. This is when its growth slows and the plants enter the reproductive stage.

Controlling Crabgrass

Crabgrass is generally controlled with preemergence herbicides that are applied before the seeds germinate. LUNSETH controls crabgrass with an early and heavy application of corn gluten meal, aiming to get it down before the soil temperatures reach 55°F. Unfortunately, we have no organic post-emergent solutions for crabgrass. Synthetic herbicides, such as Quinclorac, can kill it and are best applied during the first tillering stage.

It’s important to remember that controlling crabgrass isn’t a quick fix.  UMASS Extension warns that crabgrass cannot be controlled in one growing season because of the great number of viable seeds that can accumulate in the soil from years of infestation. It takes several years of controlling crabgrass seed production to reduce the viable seed supply.

The good news is that good cultural practices can result in a healthier, denser turf, which in turn increases its overall competitive nature and decreases the severity of crabgrass infestations. Some crabgrass infestations can be significantly reduced with the use of appropriate and well-timed cultural practices.

Conclusion

The experts at Organic Lawns by LUNSETH help our clients control crabgrass organically by emphasizing soil health, proper maintenance practices, and natural remedies. By integrating these methods into your lawn care routine, you can gradually reduce crabgrass while promoting a vibrant and resilient grassy landscape. Embracing organic solutions not only protects the environment but also contributes to a healthier and more sustainable outdoor space for you and your family to enjoy.