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American Manna Grass

Glyceria grandis

American Manna Grass, is a perennial grass that thrives in wet environments such as marshes, wet meadows, and along the edges of streams and ponds. It grows vigorously, reaching heights of 3 to 5 feet, and features bright green, glossy leaves that form dense clumps. During mid to late summer, it produces tall, airy panicles of seed heads that are highly attractive to various bird species, including waterfowl, which feed on the seeds. The plant's robust growth makes it excellent for soil stabilization and water filtration in restoration projects and naturalized areas.

Details

Height36” - 60”
Spread18"
Bloom SeasonJune – September
Soil Types
clayClay
loamLoam
sandSand
Soil Moisture
moistMoist
wetWet
Sun Exposure
fullSunFull Sun

Range Map

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Ecological Benefits

Maintenance Tips

  • Naturally adapted to wet conditions; ensure the planting area remains consistently moist or partially submerged.
  • Cut back in late fall or early spring to manage growth and remove old foliage.
  • Prefers wet, fertile soils but can tolerate varying water levels and soil types, including clay.
  • Mulching is typically not required due to its aquatic environment, but can be mulched lightly to improve soil quality and support younger plants in less saturated areas.
  • Check for and manage any signs of disease or pests, though it is generally hardy and low-maintenance in suitable wetland conditions.

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