Non-native Plants

Shortspike Canarygrass

Phalaris brachystachys

USDA symbol: PHBR3

annual grass

Hawaii: non-native, naturalized
Lower 48 states: non-native, naturalized

If you’ve ever wondered about that modest little grass popping up in wet areas around your neighborhood, you might be looking at shortspike canarygrass (Phalaris brachystachys). This annual grass isn’t exactly what you’d call a garden showstopper, but it has certainly made itself at home across several U.S. states. Shortspike ...

Shortspike Canarygrass: An Unassuming Non-Native Grass

If you’ve ever wondered about that modest little grass popping up in wet areas around your neighborhood, you might be looking at shortspike canarygrass (Phalaris brachystachys). This annual grass isn’t exactly what you’d call a garden showstopper, but it has certainly made itself at home across several U.S. states.

What Is Shortspike Canarygrass?

Shortspike canarygrass is a non-native annual grass that originally hails from the Mediterranean region. As its name suggests, it’s part of the canarygrass family, though it’s definitely the understated cousin in the group. This graminoid (that’s botanist-speak for grass-like plants) has managed to establish itself in the wild across multiple states without any help from humans.

Where You’ll Find It

This adaptable little grass has spread across six states: California, Hawaii, Louisiana, Missouri, Oregon, and Texas. It tends to pop up in disturbed areas, along roadsides, and in places where the soil stays fairly moist.

  • Species observed
  • No observations

Growing Habits and Appearance

As an annual grass, shortspike canarygrass completes its entire life cycle in one growing season. It’s classified as a facultative wetland plant, which is a fancy way of saying it really likes wet feet but can tolerate drier conditions if needed. You’ll typically find it in:

  • Wetland edges
  • Seasonally moist areas
  • Disturbed soils
  • Areas with variable moisture levels

The plant isn’t particularly tall or showy – it produces small, narrow seed heads that are easily overlooked among other vegetation.

Should You Plant It in Your Garden?

Here’s where things get interesting (or not so interesting, depending on your perspective). While shortspike canarygrass isn’t listed as invasive or noxious, there’s really no compelling reason to intentionally add it to your landscape. It offers minimal ornamental value and doesn’t provide significant benefits to pollinators since it’s wind-pollinated.

Instead of shortspike canarygrass, consider these native alternatives that will give you much more bang for your gardening buck:

  • Native sedges for wetland areas
  • Regional native grasses suited to your climate
  • Indigenous rushes for consistently moist spots

The Bottom Line

Shortspike canarygrass is one of those plants that’s simply there – not causing major problems, but not adding much to the party either. If you spot it growing wild in your area, you can simply acknowledge it and move on to planning more exciting additions to your native plant garden.

When it comes to creating a landscape that supports local wildlife and showcases the beauty of your region’s natural heritage, you’ll get far better results by choosing plants that actually belong in your neck of the woods. Your local pollinators, birds, and other wildlife will thank you for it!

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Arid West (AZ, CA, CO, ID, MT, NV, NM, OR, TX, UT, WA, WY)

Facultative Wetland

Atlantic and Gulf Coastal Plain (AL, AR, DC, DE, FL, GA, IL, KY, LA, MD, MS, MO, NC, NJ, OK, PA, SC, TN, TX, VA)

Facultative Wetland

Eastern Mountains and Piedmont (AL, AR, DC, DE, GA, IL, IN, KS, KY, MD, MO, NC, NJ, NY, OH, OK, PA, SC, TN, VA, WV)

Facultative Wetland

Great Plains (CO, KS, MN, MT, NE, NM, ND, OK, SD, TX, WY)

Facultative Wetland

Western Mountains, Valleys, and Coast (AZ, CA, CO, ID, MT, NV, NM, OR, SD, UT, WA, WY)

Facultative Wetland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae Barnhart - Grass family
Genus: Phalaris L. - canarygrass

Species: Phalaris brachystachys Link - shortspike canarygrass

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA