- Habitat: Disturbed sites and open areas
- Native/Non-native: Non-native to Eastern North America, Native of Europe
- In some areas in the world, it is grown commercially. In other areas, it is considered as a noxious weed.In North America, it competes with native plants
- Hypericum refers to the chemical "hypericin"; perforatum means "Punctured holes "
Common St Johnswort (Hypericum perforatum)