Description
Prairie Cordgrass (Spartina pectinata) is a tall, robust native grass commonly found in wet prairies, marsh edges, and low-lying areas. It forms bold clumps of upright stems and wide leaves, typically reaching 4–7 feet tall and creating strong structure in the landscape.
In late summer, it produces distinctive, comb-like seed spikes that extend from the stem, adding texture and movement. As a warm-season grass, it grows most actively in summer and handles heat and wet conditions well.
Prairie Cordgrass thrives in full sun and prefers moist to wet soils, including fertile loam, but can adapt to a range of soil types if moisture is consistent. Once established, it can tolerate short dry periods. It spreads aggressively by rhizomes, forming dense stands that are excellent for erosion control, shoreline stabilization, and wetland restoration. Because of this, it’s best suited for larger areas rather than small garden spaces.
It is especially useful for competing with invasive species like Reed Canary Grass in wet sites. Its dense root system improves soil structure and provides valuable habitat. It supports specialist moth larvae, and its seeds and roots are eaten by waterfowl and muskrats. The thick stands also provide nesting cover for wetland wildlife.
Prairie Cordgrass pairs well with other moisture-loving natives like Blue Vervain (Verbena hastata), Swamp Milkweed (Asclepias incarnata), and Soft Rush (Juncus effusus). It also works well with structural companions like Common Arrowhead (Sagittaria latifolia) and Northern Blue Flag Iris (Iris versicolor), creating a layered, functional planting in wetland and shoreline settings.
