Native grasses and other invasive species

Weed grass invasion is common in our area and will occur quickly, even in new sod lawns. The most prevalent weed grass types are annual bluegrass (poa annua), velvetgrass and bentgrass.

How they get started:

The dominant species of grass sold as seed and grown on sod farms in this area is perennial ryegrass. Because it is a bunch grass that doesn’t spread, there is vacant soil between the plants, where weed grass and broadleaf weeds can, and will, germinate.

The invaders either germinate from seed, as with annual bluegrass, or from underground growth parts called rhizomes that may be in the on-site soil at planting, or in imported topsoil. Without fumigation, these rhizomes will grow into visible plants. Unfortunately, even with a perfect start, new lawns will have visible weed grasses within the first three years without steps to keep them out.


  • Continue a high quality fertilizer and pest management program (like the Greenskeeper Plus program) to keep the turf in top shape.
  • Aerate, top-dress with sand, and over-seed yearly to keep the grass plant population high. This is very important! We have recommendations for local firms that provide these services.
  • Stay ahead of young weed grasses by pulling and/or spot treating with RoundUp®.*


* We sell a tool called "Weed Wand" for approximately $35, delivered to your door, that makes the spot treatments easy. The wand can be filled with RoundUp® herbicide solution, and then it’s a simple process of pressing the sponge tip on the weed grass. It kills an area about the size of a silver dollar with one press of the tube. We’ll deliver one to you, just give us a call.