"Neon" Grass in Your Lawn

Poa Annua (Annual Bluegrass) If you look closely, you can compare its color
to the darker grass in the background.

Two types of bluegrass, poa trivialis and poa annua (Annual Bluegrass) will appear in your lawn as neon green patches of grass in the spring. If you have a Fescue lawn, these grasses are generally regarded as weeds.

Annual Bluegrass is an annual. It will take away from the uniform color of your lawn in the spring, but will die during our hot summer. You can apply a preemergent in mid-August to prevent the grass from coming back next year.

Poa trivialis is a perennial. It is more "neon" than the annual version and tends to grow a little faster than the grass in your lawn. Because this grass is perennial, the only sure way to get rid of it is to kill out your lawn in July and reseed. Weigh your tolerance for the plant with the labor intensive project of reseeding to decide if this option is right for you.

*Poa annua and poa trivialis are very similar. The seeds on poa annua alternate, while the seeds on poa trivialis are directly opposite one another.