Northwestern Mannagrass

Glyceria occidentalis

Native to:
Canada, United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Poaceae
Genus:
Glyceria
Species:
Glyceria occidentalis
USDA Symbol:
GLOC

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Graminoid
Height:
150 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
jun,jul,aug
Bloom Colors:
green

Garden & Ecology Notes

Wildlife Value:
waterfowl, birds, small mammals

Soil Requirements

Soil Type:
rich, moisture-retentive loamy soil
pH:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
consistently moist
Notes:
Common in wetlands and riparian zones

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–30 days
Notes:
Seeds germinate best when surface-sown in consistently wet conditions with cool temperatures.

The above propagation data sourced from Claude AI