Kalm’s St. John’s Wort

Kalm's St. John's Wort

Hypericum kalmianum


Blooms golden-yellow flowers. Green foliage.

Bloom Period: Late Spring into Summer

Growth Habit: Dwarf and rounded 

Mature Height: 2' to 2.5' (60 cm to 75 cm)

Mature Spread: 2' to 2.5' (60 cm to 75 cm)

Growth Rate: Slow


More Details

Sun Exposure: Full sun to partial shade

Cold Hardiness Zone: 4

Drought tolerant

Long blooming

Attracts butterflies

Landscape Uses: Foundation planting, container and garden

Native to Ontario