Calamagrostis inexpansa, commonly known as Northern Reedgrass or Unexpanded Reed Grass, is a perennial grass native to wetland areas such as marshes, swamps, wet meadows, and along shorelines across North America, Siberia,. It exhibits a moderate growth rate and typically reaches a height of 2-4 feet (0.6-1.2 meters) with a spread of 1.5-2.5 feet (0.5-0.8 meters). This grass forms dense clumps and has narrow, green leaves. The inflorescence is a feathery, greenish-yellow panicle that blooms in the summer, adding a delicate texture to the landscape. While not particularly showy, the flowers provide a subtle charm and movement in the breeze.

Northern Reedgrass is valued for its ability to thrive in wet conditions and is often used for soil stabilization along water bodies. It is also suitable for rain gardens and naturalized areas where it can handle periodic flooding. This grass prefers full sun to part shade and grows best in medium to slow-draining clay or loam soils that retain moisture. It is relatively low maintenance but may require division every few years to manage its spread. While it is generally disease-resistant, it can be susceptible to rust in overly wet conditions. Northern Reedgrass is not known for being invasive but should be monitored to ensure it does not outcompete other desirable wetland species.CC BY-SA 4.0