trefle.io · Taken Aug 27, 2017 by binah (cc-by-sa)
Hypericaceae
Klamathweed
Hypericum perforatum
Also known as Hypericum officinarum, St. John's wort, Perforate St. John's wort, Common St. Johnswort
Native Plants · Edibles & Herbs · Medicinal · Herb · Yellow Flowers · Perennial · Drought Tolerant · Wildflower · Pollinator · Self Seeding
St. John's Wort is a low-maintenance perennial herb that produces bright yellow flowers and tolerates poor soils. Water moderately and allow soil to dry between waterings to prevent root rot. This hardy plant self-seeds readily and is valued both for its cheerful blooms and traditional medicinal uses.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Moderate watering allowing soil to dry between waterings · Every 10-14 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6.5–7
- Temperature
- -30°F to 95°F
- Cycle
- Perennial
- Propagation
- Seed
Hardiness
USDA 4a-10b
Form & growth
Mature size and habit
- Mature height
- 2 ft – 5 ft
- Spread
- 2 ft
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Afghanistan, Alabama, Albania, Algeria, Altay, Argentina Northeast, Argentina South, Arkansas, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, Brazil Southeast, British Columbia, Bulgaria, Buryatiya, California, Canary Is.
- Attracts
- Bees, Butterflies
Sources: trefle, usda, aspca
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