Common Weeds in the Upper Macquarie Area

St John’s Wort

Scientific Name: Hypericum perforatum

A prolific seeder with long lived, easily spread, seeds. Will outcompete most pastures. Can be controlled by cultivation and herbicide. Causes photosensitisation, particularly in sheep and horses.


Department Primary Industries – NSW WeedWise – St John’s Wort

Macquarie Valley & Lachlan Valley Weeds Authority Committees – St John’s Wort