Johnson Grass

Sorghum halepense

no photo — written note
photo: Wikimedia Commons
Plants

A tall crop-field grass with a stout white midrib and spreading rhizomes.

Field facts
HabitatField edges, roadsides, disturbed ground
RangeStatewide, common in the south
When to lookFlowers July to September
StatusInvasive; state noxious weed (Indiana DNR / IUCN Red List)
Look-alikesIndiangrass, Corn seedlings

Field note: Drought-stressed leaves can build up dangerous levels of cyanide.

Lesson
Watching responsibly

Do not feed stressed foliage to livestock; it can turn toxic.

Wilted or frosted foliage is toxic to livestock.

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