Japanese Stiltgrass
Microstegium vimineum · Warm-season, annual, C4
AI-generated identification · may be incorrect
Grass Category
Invasive/Weed
Hardiness Zones
USDA zones 5 through 9, highly adaptable to temperate and subtropical climates with winter die-off as an annual.
About This Grass
A delicate, sprawling annual grass growing 1 to 3 feet tall with pale green, lance-shaped leaves. Forms dense, uniform monocultures in shaded areas.
Blade Characteristics
Asymmetrical leaves are 1 to 3 inches long and roughly 1/4 inch wide, featuring a distinct off-center silvery stripe of reflective hairs along the midrib on the upper surface.
Growing Information
Growth Habit
Stoloniferous, sprawling mat-former with weak stems rooting at lower nodes.
Sunlight & Water Needs
Thrives in deep to partial shade and moist soils, though it adapts to varied moisture levels. Tolerates poor soils and low light exceptionally well.
Mowing & Maintenance
Low mowing or weed-whacking prevents seed set if done before late summer. High maintenance required for eradication due to persistent seed banks.