Ask the Experts: What is this odd grass in my lawn?

Annual Bluegrass (Poa Annua) has become a fact of life in our local lawns. This native grass stands out during this season due to the plentiful small, whitish seeds it produces.

Generally speaking, it is NOT economically feasible to control Poa Annua, as it is much better suited to our climate than the more desirable ryegrass / fescue

blends most people prefer. However, if Poa Annua is in small patches, you can

treat it with Glyphosate (Round-up) and reseed, or sod the spots.

There are some ways to discourage Poa Annua:

• Water 2 days a week, 45 to 50 minutes per section. Less frequent, deep watering, favors deeper-rooted rye grass and fescue.

• Aerate spring and fall, Poa Annua prefers compacted soil.

• Promote good drainage. Gypsum, applied with aeration, aids in drainage.

• Mow at 3 inches or higher

Because Poa Annua is so widespread and persistent, managing it and blending it into your lawn may be your best option. 

It is usually only obvious 6-8 weeks a year, when in seed. The rest of the time, other than a slightly "patchy" effect, Poa Annua blends well (compared to other invasive grasses) in most turf situations.