Johnson grass (Sorghum halepense) is a vigorous, perennial grass known for its invasive tendencies and deep rhizomes, making it a difficult weed to control in agricultura
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Sunlight
Full Sun
Watering
Drought Tolerant
Soil
Adaptable
Temperature
Warm to Hot
Fertilizer
Not Required
Full Sun
Thrives in full sun exposure for optimal growth and reproduction.
Drought Tolerant
Water deeply during prolonged dry periods; allow soil to dry between waterings.
Adaptable
Warm to Hot
Prefers warm to hot temperatures; susceptible to frost damage.
Not Required
Generally not fertilized; can promote excessive growth if nutrient-rich.
Plant Type
Grass
Plant Category
Ornamental
Plant Place Type
Garden
Lifespan
Perennial
Plant Height
0.6-2.0 m
Spread
Clonal
Growth Rate
Fast
Dormancy
Semi-dormant
Leaf Color
Green
Leaf Type
Linear
Flower Size
10-50 cm (inflorescence)
Optimal Sunlight Lux
60000
Weed Status
Yes
Toxic for humans
No
Rating: 0/5
Toxic for pets
No
Rating: 0/5
Contains cyanogenic glycosides (dhurrin) which can release hydrogen cyanide (prussic acid) when the plant is stressed (e.g., frost, drought, wilting). This is highly toxic and potentially fatal to livestock and humans if ingested.
