Foxtail Bristlegrass
Setaria viridis · Warm-season, annual, C4
AI-generated identification · may be incorrect
Grass Category
Invasive/Weed
Hardiness Zones
USDA zones 3 to 9, highly resilient with high heat tolerance and annual life cycle dormancy.
About This Grass
Forms upright clumps up to two feet tall with soft green foliage, featuring a distinct dense, cylindrical, bristly seed head.
Blade Characteristics
Narrow, flat blades with pointed tips, smooth surfaces, rolled vernation, and a membranous fringe ligule.
Growing Information
Growth Habit
Bunch-type, upright growth, spreads entirely by seed.
Sunlight & Water Needs
Thrives in full sun with moderate to low water needs, adapting easily to poor, disturbed soils.
Mowing & Maintenance
Requires frequent mowing to prevent seed production and high maintenance due to its weedy nature.
Identified on 9/24/2026