Scientific Name: Hypericum calycinum
Common Name: St. John's wort
Family Name: Hypericaceae
Origin: Europe
Hardiness Zone: Zone 6: (-23 to -18 °C)
Plant Type: Ground cover, Semi-evergreen
Mature Size: 0.2 - 0.4m x > 25m (height x width)
Habit: Spreading
Form: Mounded, Oval - horizontal
Texture: Medium
Landscape Uses: Erosion control, Ground cover, Group or mass planting, Rock garden, Summer interest
Exposure: Full sun, Part sun/part shade, Filtered shade, Deep shade
Soil or Media: Well-drained
Leaves: Simple, Opposite, Sessile, Pinnate venation, Rugose, Elliptic, Oblong, Ovate, Entire
Flowers: Flowers solitary, Yellow, Jul-Aug-Sep
Fruit: Capsule, Brown, Jul-Aug-Sep
Key ID Features:
Semi-evergreen, spreading ground cover; leaves leathery, opposite, ovate and almost geometric on the stem; flowers to 3-5cm wide, bright yellow solitary in summer (not as tall as H. 'Hidcote', and H. calycinum has a conspicuous calyx).