st. john's wort
Hypericum calycinum
USDA zones5 to 9
SunHandles full sun to partial sun
WaterHandles dry to moist soil
Size12 to 18 inches tall18 to 24 inches wide
- Growth rate
- Rapid
- Habit
- Horizontal
- Bloom season
- Summer, autumn
- Bloom color
- Bright yellow
- Foliage color
- Blue, green, purple/lavender
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
St. John's wort (Hypericum calycinum) is a shrub for borders, rock gardens, and ground cover. It is hardy to USDA zone 5, or down to -20°F (-29°C). This plant likes full or part sun and dry to moist soil of most types. It is evergreen and drought tolerant, so it needs little care. Bright yellow flowers open in early to late summer and attract butterflies. It grows fast and spreads low and wide.
Pairs well with Karl Foerster feather reed grass, Prairie dropseed, Greig's tulip, and Blazing star.
Native range
Southern Europe and southwestern Asia.