St. John's wort
3
3
5Will it grow where I live?
St. John's wort is hardy to zone 3 – that covers all of Central Europe and the British Isles, and every USDA zone from 3 upwards.
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Profile
- Family
- Hypericaceae
- Habit
- perennial
- Height
- 0.9 m
- Spread
- 1.5 m
- Growth
- medium
- Lifespan
- 8 years
- First yield
- after 2 years
- Hardiness
- zone 3–8
- Shade tolerance
- partial shade
- Soil
- Sand, Silt, Loam
- Soil moisture
- semi-dry – very moist
- pH
- 5.5 – 8
Flowering & harvest
| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flowering |
Uses
Frequently asked questions
St. John's wort: how big does it get?
St. John's wort (Hypericum perforatum) grows as a perennial and reaches roughly 0.9 m in height when mature, with a spread of about 1.5 m. Growth is medium.
St. John's wort: what site does it need?
St. John's wort tolerates partial shade. Suitable soils are Sand, Silt, Loam. Soil moisture should be in the range semi-dry – very moist. The pH may lie between 5.5 and 8.
St. John's wort: is it hardy?
St. John's wort is listed as hardy in zone 3–8 and survives normal winters outdoors there.
St. John's wort: will it grow in Central Europe?
St. John's wort is hardy to zone 3 – that covers all of Central Europe and the British Isles, and every USDA zone from 3 upwards.
St. John's wort: when does it flower?
In a temperate northern-hemisphere climate it flowers from June to July.
St. John's wort: is it poisonous?
No toxicity is recorded for St. John's wort. With wild plants, never rely on a database alone — only on a confident identification.
St. John's wort: what is it used for?
Rated on a scale up to 10: Edible 3/10, Medicinal 3/10, Other uses 5/10.
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Community experience
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