Quackgrass
Agropyron repens
Last reviewed: June 2026
Light
part shade
Water
medium
Size
12"–48" H × 6"–24" W
Bloom
Jun, Jul, Aug, Sep
Native to
CO
Browse plants for this ecoregion
Quackgrass is an aggressive, spreading perennial grass that forms dense colonies through underground rhizomes. It produces upright seed heads from summer through early fall and can quickly dominate other plantings. This species is considered a noxious weed in many areas due to its invasive nature.
In an HOA neighborhood
Quackgrass takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
- Spreads aggressively and invades neighboring properties
- Extremely difficult to control once established
Wildlife value
Provides some habitat and nesting material for small wildlife, though its aggressive growth often displaces more beneficial native plants that support diverse pollinators and wildlife.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Quackgrass fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.