Kalm St. John's Wort

Kalm St. John's Wort (Hypericum kalmianum) is a drought‑ and salt‑tolerant noted for its golden yellow clusters. It typically reaches 0.6–0.9 m (2–3 ft) tall and 0.6–0.9 m (2–3 ft) wide, thriving in full sun to part shade and average, well‑drained. Hardy in Canadian zones 4–7, it delivers seasonal interest and dependable performance.

Key Features
• Botanical name: Hypericum kalmianum
• Common name: Kalm St. John's Wort
• Hardiness zones: Canada Zone 4–7
• Exposure: Full sun to part shade
• Soil: Average, well‑drained
• Height: 0.6–0.9 m (2–3 ft)
• Width: 0.6–0.9 m (2–3 ft)
• Foliage: Narrow blue‑green leaves
• Flower colour: Golden yellow clusters
• Bloom time: Mid‑ to late summer
• Maintenance: Low; prune in early spring
• Advantages: Drought‑ and salt‑tolerant; attractive berries