Reed canary grass has invasive traits that enable it to spread aggressively. It is considered potentially invasive in many areas. An invasive plant is a plant species that is non-native to the location being considered and whose presence and spread negatively impacts (or is likely to impact) ecological, economic, or human health. This plant spreads through both rhizomes and seeds. It is a wetland plant that is commonly found in roadside ditches and wet natural areas. Reed canary grass is found throughout much of the northern and western United States. It is able to produce dense thickets in wet areas and can displace native species and alter habitats. These factors contribute to the reduction of species diversity.
Reed canary grass is an unusual species that is thought to be native to North America, Europe, and Asia, with different ecotypes existing on different continents. These ecotypes look identical but vary in their growth. It is thought that the more aggressive Eurasian ecotypes have outgrown and possibly replaced, or hybridized with, the native ecotypes.
There are a number of native and non-native species that could be used in place of reed canary grass. More desirable species may be found using the Search Trees and Plants page of the Arboretum website. Before purchasing or planting, be sure to check for any local or state guidelines on these species, and make sure that the plant is suitable for its habitat by checking its attributes at mortonarb.org or plants.usda.gov.
- Family (English) Grass
- Family (botanic) Poaceae
- Tree or plant type Grass
- Native locale Non-native
- Size range Large plant (more than 24 inches)
- Light exposure Full sun (6 hrs direct light daily), Partial sun / shade (4-6 hrs light daily)
- Hardiness zones Zone 3, Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8
- Soil preference Moist, well-drained soil, Wet soil
- Tolerances Wet sites
- Season of interest mid spring, late spring, early summer, midsummer, late summer, early fall
- Flower color and fragrance Other
- Shape or form Upright
