Johnson Grass
Sorghum halepense
Also listed as Holcus halepensis, Andropogon halepensis
Also known as Aleppo Grass, Columbus Grass, Egyptian Millet
Climate Match for your location
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Johnson grass is a tall, vigorous warm-season grass with deep rhizomes and panicle-type seed heads. It is highly invasive in many regions and typically considered a problematic weed rather than an ornamental plant.
Why grow it
Johnson grass is occasionally retained in permaculture systems for erosion control, livestock fodder, or biomass production where its vigor and deep rhizome system can be managed. Compared to slower-establishing perennial grasses, it establishes quickly in warm seasons and tolerates poor soils. However, its aggressive growth habit and difficulty of removal make it unsuitable for most garden contexts where native or non-invasive alternatives exist.
Watch out for
Johnson grass spreads vigorously through both seed and rhizome fragmentation, making it persistent once established in cultivation. Containment within a managed space requires consistent mowing, cultivation, or herbicide application to prevent escape into adjacent areas. Equipment and soil movement can inadvertently spread rhizome fragments to new locations.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Poaceae
Native Range
Mediterranean and North Africa
Seasonality
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Flood Tolerance
Deer Resistance
Inferred from USDA browse palatability
pH Range
Soil Texture
Establishment & Care
- Establishment
- Maintenance
- Propagation
Johnson grass is a tall, vigorous warm-season grass with deep rhizomes and panicle-type seed heads. It is highly invasive in many regions and typically considered a problematic weed rather than an ornamental plant.
Climate Match for your location
See how well Johnson Grass grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Johnson grass is occasionally retained in permaculture systems for erosion control, livestock fodder, or biomass production where its vigor and deep rhizome system can be managed. Compared to slower-establishing perennial grasses, it establishes quickly in warm seasons and tolerates poor soils. However, its aggressive growth habit and difficulty of removal make it unsuitable for most garden contexts where native or non-invasive alternatives exist.
Watch out for
Johnson grass spreads vigorously through both seed and rhizome fragmentation, making it persistent once established in cultivation. Containment within a managed space requires consistent mowing, cultivation, or herbicide application to prevent escape into adjacent areas. Equipment and soil movement can inadvertently spread rhizome fragments to new locations.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Poaceae
Native Range
Mediterranean and North Africa
Seasonality
Season of Interest
Herb
Soft non-woody plants of the field layer.
Succession Role
Tolerances & Soil
Flood Tolerance
Deer Resistance
Inferred from USDA browse palatability
pH Range
Soil Texture
Establishment & Care
- Establishment
- Maintenance
- Propagation
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