Long Mannagrass
Glyceria melicaria
Last reviewed: June 2026
The USDA PLANTS Database (opens in new tab) does not flag Long Mannagrass as toxic to livestock.
Light
part sun
Water
medium
Size
12"–36" H × 6"–24" W
Bloom
Jun, Jul, Aug
Native to
AL, CT, GA, KY and 15 more states
Glyceria melicaria is a native perennial grass that forms clumps 1-3 feet tall with a moderate spread. It produces delicate flower heads during summer months and thrives in partial sun with average moisture. This cool-season grass provides a naturalistic texture to garden beds.
In an HOA neighborhood
Long Mannagrass takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Requires consistently wet conditions that may create soggy appearance
- Can look unkempt compared to traditional turf grass
- May spread beyond intended planting area
Wildlife value
This native grass produces seeds that feed songbirds and small mammals. The foliage provides nesting material and shelter for various wildlife species.
Common questions
- How much sun does Long Mannagrass need?
- Long Mannagrass grows best in part sun conditions.
- When does Long Mannagrass bloom?
- Long Mannagrass blooms in June, July, and August.
- Where is Long Mannagrass native?
- Long Mannagrass (Glyceria melicaria) is native to AL, CT, GA, KY and 15 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Long Mannagrass toxic to livestock?
- The USDA PLANTS Database does not flag Long Mannagrass as toxic to livestock.
- Is Long Mannagrass HOA-friendly?
- Long Mannagrass takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Long Mannagrass? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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