Kalm's St. John Wort
Hypericum Kalmianum
Overview
Hypericum kalmianum, or Kalm's St. John's Wort, is a compact, dense shrub reaching 2-3 ft tall and wide. This hardy perennial features showy, bright yellow flowers in summer, each with a burst of prominent stamens. Its bluish-green foliage remains attractive throughout the growing season. Ideal for borders and mass plantings, it thrives in full sun to partial shade and well-drained soil. Zone 4-8 hardiness ensures wide-ranging adaptability.
Sun Full, Half, ShadeWater Extra in Summer, MediumZones 4–7Type Broadleaf Evergreen, ShrubClimate Temperate
Culture
- Sun
- Full, Half, Shade
- Water
- Extra in Summer, Medium
- USDA zones
- 4–7
Shape & size
- Mature height
- 2–3 Ft.
- Mature width
- 2–3 Ft.
Classification
- Type
- Broadleaf Evergreen, Shrub
- Family
- Hypericaceae
- Climate
- Temperate
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