North America Native Plant

Slimstem Reedgrass

Botanical name: Calamagrostis stricta stricta var. stricta

USDA symbol: CASTS8

Life cycle: perennial

Habit: grass

Native status: Native to Alaska âš˜ Native to the lower 48 states  

Synonyms: Calamagrostis neglecta (Ehrh.) G. Gaertn., B. Mey. & Scherb. (CANE)  âš˜  Calamagrostis neglecta (Ehrh.) G. Gaertn., B. Mey. & Scherb. var. gracilis (Scribn.) Scribn. (CANEG2)  âš˜  Calamagrostis neglecta (Ehrh.) G. Gaertn., B. Mey. & Scherb. var. micrantha (Kearney) Stebbins (CANEM)  âš˜  Calamagrostis neglecta (Ehrh.) G. Gaertn., B. Mey. & Scherb. ssp. stricta (Timm) Tzvelev (CANES)   

Slimstem Reedgrass: A Native Grass for Wet Spots in Your Garden Ever wondered what to plant in those persistently soggy spots in your yard? Meet slimstem reedgrass (Calamagrostis stricta stricta var. stricta), a graceful native grass that actually thrives where other plants fear to tread. This slender perennial might just ...

Slimstem Reedgrass: A Native Grass for Wet Spots in Your Garden

Ever wondered what to plant in those persistently soggy spots in your yard? Meet slimstem reedgrass (Calamagrostis stricta stricta var. stricta), a graceful native grass that actually thrives where other plants fear to tread. This slender perennial might just be the solution you’ve been looking for in those challenging wet areas of your landscape.

What Makes Slimstem Reedgrass Special?

Slimstem reedgrass is a true native success story, naturally occurring across an impressive 21 states spanning from Alaska all the way down to Arizona and from coast to coast. This graminoid – that’s botanist-speak for grass-like plant – belongs to the large family of grasses and their relatives that form the backbone of many natural ecosystems.

As a perennial, this grass returns year after year, slowly establishing itself into a reliable part of your landscape. Its common name gives away one of its key features: those characteristically slim, upright stems that create an elegant, fine-textured appearance in the garden.

Where Does It Grow?

This adaptable native calls home a vast swath of North America, thriving in states including Alaska, Arizona, California, Colorado, Idaho, Illinois, Maine, Michigan, Minnesota, Montana, Nevada, New Hampshire, New York, North Dakota, Oregon, South Dakota, Utah, Washington, West Virginia, Wisconsin, and Wyoming. Talk about a well-traveled plant!

Why Consider Slimstem Reedgrass for Your Garden?

Here’s where this grass really shines – it’s perfect for those spots where you need something native, low-maintenance, and capable of handling wet conditions. Consider adding slimstem reedgrass to your landscape if you have:

  • Areas with consistently moist or wet soil
  • Rain gardens or bioswales
  • Naturalistic landscape designs
  • Wetland restoration projects
  • Spots where you want to support native plant communities

Growing Conditions and Care

The beauty of native plants like slimstem reedgrass lies in their ability to thrive with minimal fuss once you understand their preferences. This grass naturally gravitates toward moist to wet soils and can handle both full sun and partial shade conditions.

Based on its wide geographic distribution, slimstem reedgrass appears adaptable to USDA hardiness zones 3 through 7, making it suitable for most northern and central regions where it naturally occurs.

Planting and Establishment Tips

When establishing slimstem reedgrass, patience is key. Like many native grasses, it may take a season or two to really settle in and show its true potential. Plant in spring after the last frost, ensuring the soil remains consistently moist during the establishment period.

Once established, this low-maintenance native typically requires minimal intervention. Its natural adaptation to wet conditions means you won’t need to worry about overwatering – in fact, it’s quite the opposite problem solver!

The Bottom Line

Slimstem reedgrass offers gardeners a chance to work with nature rather than against it. If you’re dealing with wet areas in your landscape and want to incorporate native plants that support local ecosystems, this unassuming grass could be exactly what you need. While it may not be the showiest plant in your garden, it serves an important ecological role and brings that subtle, naturalistic beauty that only native plants can provide.

Remember, successful native gardening is often about choosing the right plant for the right place – and for persistently moist spots, slimstem reedgrass just might be your perfect match.

Slimstem Reedgrass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Calamagrostis Adans. - reedgrass

Species

Calamagrostis stricta (Timm) Koeler - slimstem reedgrass

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