American Mannagrass

Glyceria grandis, Poaceae

Zones

2–8

Layer

Herbaceous

Lifespan

Perennial

Growth

Fast

Guild Roles

ProducerBeneficial Insect Habitat

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

High (established)High (fruiting)High (seedling)

Soil pH

5.5 – 7.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Marsh SkullcapScutellaria galericulata

Physical SupportBeneficial Insect Habitat

Arumleaf ArrowheadSagittaria cuneata

Pollinator SharingBeneficial Insect Habitat

Indian Joint VetchAeschynomene indica

Nitrogen Fixation

Shoreline SedgeCarex hyalinolepis

Nutrient AccumulationBeneficial Insect Habitat

Common Three-squareSchoenoplectus pungens

Physical SupportBeneficial Insect Habitat

Antagonistic Plants

Texas Wild RiceZizania texana

Large grasses compete for wetland space with potential allelopathic interactions

Giant Bur-reedSparganium eurycarpum

Both large graminoids compete for similar rooting space and light resources in wetland margins

Uses

Functions

Water FiltrationErosion ControlWildlife HabitatConstructed Wetland Component

Edible Parts

SeedsYoung Shoots

Common Questions

What zones does American Mannagrass grow in?

American Mannagrass grows in USDA hardiness zones 2 through 8.

What are good companion plants for American Mannagrass?

Good companions for American Mannagrass include Marsh Skullcap, Arumleaf Arrowhead, Indian Joint Vetch, Shoreline Sedge, Common Three-square.

Design guilds with American Mannagrass and see companion relationships visually.

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