Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Tweedy's reedgrass

Calamagrostis tweedyi

Also called Cascade Reedgrass

Tweedy's reedgrass
Photo: Biodiversity Heritage Library, Public domain

Tweedy's reedgrass is a native perennial grass of moist montane and subalpine meadows and forests in the Pacific Northwest, forming loose clumps with broad flat leaves. It suits cool, moist conditions and is mainly grown as a native landscape or meadow plant.

Family
Poaceae (Grass family)
Grows as
Grass, Perennial
Light
Part shade, Full sun
Water
Keep soil consistently moist during the growing season, avoiding waterlogging.
Soil
Moist, well-drained loam or garden soil.
Temperature
Hardy in cool climates; tolerates winter cold typical of its montane native range.
How easy
Easy

About

Calamagrostis tweedyi, the Cascade reedgrass or Tweedy's reedgrass, is a perennial in the grass family. It is native to the Pacific Northwest in the United States, in Washington, Oregon, Idaho, and Montana.

Where it grows

Calamagrostis tweedyi is endemic to the Pacific Northwest in the United States, growing in central Washington, Oregon (reported from near Crater Lake), central Idaho, and western Montana. It grows in montane and subalpine moist meadows and coniferous forests at 900–2000 m elevation.

Other Greeneochloa plants

Reedgrass

Text excerpted from the Wikipedia article Calamagrostis tweedyi by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…