Johnson Grass
Q.

Is Johnson grass poisonous to cattle?

Zone Northern Tablelands nNSW | anne.vosper added on April 4, 2015 | Answered

Got some seed from for my canaries and thought about planting some in my garden but I don't want it to spread to the paddocks if it is poisonous to cattle.

A.
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shelley
Certified GKH Gardening Expert
Answered on April 4, 2015

Johnson grass can be toxic to our livestock, but only under certain conditions. It produces a toxin, prussic acid, when it is under stress (such as drought, freezing weather). More information can be found here:

http://wilkes.ces.ncsu.edu/2014/10/johnsongrass-in-pastures-can-be-toxic/

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