Johnsongrass
Sorghum halepense · Warm-season, perennial, C4
AI-generated identification · may be incorrect
Grass Category
Invasive/Weed
Hardiness Zones
USDA zones 6-10, sensitive to severe freezing temperatures but overwinters via underground rhizomes.
About This Grass
Tall, coarse upright grass reaching up to 7 feet with bright green leaves and a large, open, reddish-purple panicle seed head.
Blade Characteristics
Wide flat blades up to 1 inch across with a prominent white midrib, pointed tips, and a membranous ligule.
Growing Information
Growth Habit
Rhizomatous and bunch-type, aggressive spread forming dense stands.
Sunlight & Water Needs
Full sun, highly adaptable to various moisture levels with strong drought tolerance, thrives in fertile well-drained soils.
Mowing & Maintenance
Difficult to control by mowing alone due to deep rhizomes; requires intensive management or herbicides.
Identified on 9/30/2026