Indiangrass (Sorghastrum nutans)

Indiangrass (Sorghastrum nutans)

Indiangrass is the prairie's golden standard — its seed heads catching the autumn light in a shimmer of bronze and gold that makes the whole prairie seem to glow from within. Paired with Big Bluestem, it formed the backbone of the tallgrass prairie ecosystem, and together they created the moving sea of grass that defined the Cajun coastal prairie of southwestern Louisiana for millennia.

Botanical Profile

• Family: Poaceae (Grass family)
• Native Range: Eastern and central North America from Ontario to Florida and west to the Rocky Mountains; native to Louisiana's coastal prairies
• USDA Hardiness Zones: 4–9
• Mature Size: 3–6 feet tall
• Bloom/Seed Time: August–October; golden seed heads and yellow fall color persist through winter
• Sun: Full sun
• Soil: Well-drained to average; tolerates clay and drought; deep-rooted and soil-building

Prairie Movement & Ecological Role

Indiangrass's feathery golden seed heads are among the most beautiful of any native grass — catching the wind and light in a way that transforms the late-summer prairie into something luminous. It is a host plant for the Cobweb Skipper, Dusted Skipper, and Swarthy Skipper butterflies. Its seeds are a critical food source for Dickcissels, Grasshopper Sparrows, and Henslow's Sparrows — grassland birds in steep decline that depend on native prairie grasses for survival. Its deep roots build soil organic matter and sequester carbon at rates comparable to Big Bluestem.

In the Prairie Movement Strip

Part of the Prairie Movement Strip | Wind, Pollinators & Motion collection at Big Mamou Enterprises, Indiangrass brings the golden light of the tallgrass prairie to the Louisiana garden — luminous, graceful, and alive with movement.