St. Johnswort
Hypericum pulchrum
- Native to:
- Austria, Belgium, Czechia-Slovakia, Denmark, Føroyar, France, Germany, Ireland, Italy, Netherlands, Norway, NW. Balkan Pen., Poland, Portugal, Spain, Sweden, Switzerland
Krzysztof Ziarnek, Kenraiz
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Hypericaceae
- Genus:
- Hypericum
- Species:
- Hypericum pulchrum
- USDA Symbol:
- HYPU9
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 60 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- jun,jul,aug,sep
- Bloom Colors:
- yellow
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★☆☆ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- bees, butterflies
- Deer Resistant:
- Yes
Soil Requirements
- Soil Type:
- sandy, acidic, nutrient-poor soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to heathlands and open woods
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–90 days
- Germination Time:
- 14–42 days
- Notes:
- Seeds require light for germination; surface sow and do not cover.
The above propagation data sourced from Claude AI