Sorghum halepense is a perennial grass reaching about 2.0 m and typically found in open, sunny positions. It flowers from July to October. The plant grows in a range of soils from sandy to clay, favouring well‑drained or moist but well‑drained conditions. It is toxic to livestock and should not be grazed.

Johnson grass (Sorghum halepense) is a perennial grass to about 2.0 m that flowers July to October and prefers full sun and well‑drained soils.

https://en.wikipedia.org/wiki/Johnson_grass

Sorghum halepense

Johnson grass | Sorghum halepense

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