Hypericum calycinum
St. John’s Wort is a hardy, low-growing perennial shrub valued for its bright yellow, cup-shaped flowers and dense, spreading habit. Blooming in summer, it provides long-lasting color and attractive evergreen-to-semi-evergreen foliage in many climates.
Also Known As (AKA):
- St. John’s Wort Groundcover
- Creeping St. John’s Wort
- Hypericum Groundcover
- Hypericum calycinum
This versatile plant is widely used as a groundcover for slopes, borders, mass plantings, and erosion control. It spreads steadily to form a dense carpet, helping suppress weeds while adding bright seasonal interest.
- ● Large, bright yellow summer flowers
- ● Dense, spreading groundcover habit
- ● Attractive green foliage
- ● Low maintenance and adaptable
- ● Ideal for slopes, borders, and mass planting
- ● Deer resistant
Note: St. John’s Wort performs best in well-drained soil and adapts to a wide range of growing conditions. Occasional pruning helps maintain a tidy appearance.
Growing Zones: 5–9 (Outdoors)
| Mature Height: | 12–18 in. |
| Mature Width: | 24–36 in. |
| Sunlight: | Full Sun to Partial Shade |
| Botanical Name: | Hypericum calycinum |
| Growth Rate: | Moderate |
| Bloom Time: | Summer |
| Plant Type: | Perennial Groundcover |
FAQ's
Is St. John’s Wort a good groundcover?
Yes. Its spreading habit makes it excellent for groundcover, erosion control, and mass planting.
Does it need full sun?
It performs best in full sun but tolerates partial shade.
When does it bloom?
St. John’s Wort blooms during summer with bright yellow flowers.
Is it deer resistant?
Yes. It is generally not favored by deer.
Is it low maintenance?
Yes. Once established, it requires minimal care and occasional pruning.
