What Are The Light Green Patches In My Lawn?

You may notice some lighter green patches appearing in your lawn during the spring, especially in Kentucky Bluegrass lawns. In many cases, this is Poa Annua (Annual Bluegrass), a naturally occurring grassy weed that is extremely common throughout Connecticut and the Northeast.

Poa Annua typically stands out this time of year because it grows faster and appears a much lighter lime-green color compared to the darker green Kentucky Bluegrass surrounding it. Cool, wet spring weather allows it to thrive temporarily, making it more noticeable in April and May.

One important thing to understand is that Poa Annua is not caused by fertilization applications or anything done during the lawn treatment process. It naturally exists in many lawns and can even be present in some Kentucky Bluegrass seed varieties or introduced over time through wind, birds, mowing equipment, foot traffic, and soil movement. Even very healthy, professionally maintained lawns can experience some Poa presence.

Unfortunately, there is no selective control product that removes Poa Annua from Kentucky Bluegrass lawns without also harming the desirable turfgrass. Because of this, the best approach is maintaining overall lawn density and health through proper fertilization, mowing, watering, and cultural practices.

The good news is that Poa Annua is usually most noticeable during the cooler spring months. As we move closer to summer and temperatures rise, much of it naturally weakens, dries out, and fades away on its own.

At Green Choice, our goal is always to promote the healthiest, thickest lawn possible while managing naturally occurring lawn challenges the best we can through proper agronomic practices.