St John's Wort
Hypericum perforatum
Hypericum perforatum, commonly known as St. John's wort, is a flowering plant in the family Hypericaceae. It is a hairless, perennial herb with woody roots, yellow flowers marked by black glands, and leaves that appear perforated due to translucent glands, producing thousands of seeds per plant.
Description from Wikipedia (CC BY-SA).
⚠ Safety
Medicinal only; causes skin photosensitivity and interacts with many medications. Toxic to grazing livestock.
At a glance
- Sunlight
- Full sun
- Water need
- Low
- Mature height
- 0.6 m
- Maintenance
- Low
- Hardiness
- USDA 4–9
- Layers
- herb, groundcover
Functional roles
Propagation
How to make more of this plant for free — the permaculture way.
When: Divide spring; self-seeds
Sunny yellow flowers for bees; the famous mood-supporting herb. Can spread, so manage it.
Where to get it
Read more
Seed data pending expert review. Identification photo and description are sourced from Wikipedia/Wikimedia; always confirm a plant in person before eating any part of it.