St Johns Wort — Flowers
Hypericum perforatum
Full sun, light watering — fully hardy.
- Sow
- Mar
- Plant out
- Apr–Jun
- In flower
- Jun, Jul, Aug
- Sun
- Full sun
- Water
- Low
- Difficulty
- Easy
- Hardiness
- H6
- Season
- summer
- Height
- 100–150 cm
- Spacing
- 100 cm
- Pets
- Toxic to pets
- Bee friendly
- Bee friendly
- Native
- Native
Growing notes
Grows to 1-1.5 metres. Space about 50-100cm apart. In flower Jun-Aug.
Toxic to pets
St John's Wort is grown as an ornamental and its fruit is not for eating: it is rated low toxicity, but a person who eats a lot of it may get a mild stomach upset. Dogs, cats and horses that eat the plant can become painfully sensitive to sunlight, with sore skin. If a child eats a quantity, get medical advice; if a pet eats it, ring your vet and keep the animal out of strong sun.
→ NHS 111 for a person; your vet or the Animal PoisonLine for an animal