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Product Details
Description
Hypericum calycinum (St. Johnswort)
Glossy Foliage and Golden Blooms for Groundcover & Erosion Control
St. Johnswort is a hardy, fast-spreading groundcover perennial that creates a lush carpet of glossy green leaves accented by large golden-yellow blooms in summer. Known for its durability, it thrives in full sun to part shade and adapts to various soil types, making it a perfect solution for slopes, erosion control, and naturalized plantings. With its ability to attract pollinators, resist deer, and provide year-round beauty, this versatile plant combines ornamental charm with practical landscape value.
- � Glossy, dense green foliage
- � Large golden-yellow flowers with showy stamens
- ☀️ Thrives in full sun to part shade
- � Mature Size: 12–18 in. tall, 24–48 in. wide
- � Excellent for borders, slopes, and erosion control
- � Deer-resistant and easy to grow
- � Attracts bees and pollinators
Note: A dependable groundcover with bright flowers and year-round foliage interest, ideal for low-maintenance landscapes.
Growing Zones: 5–9 outdoors

| Mature Height: | 12–18 in. |
| Mature Width: | 24–48 in. |
| Sunlight: | Full Sun to Part Shade |
| Botanical Name: | Hypericum calycinum |
| Common Name: | St. Johnswort |
| Growth Rate: | Fast |
| Type: | Semi-Evergreen Groundcover Perennial |
| Bloom Time: | Summer |
FAQ's
Is St. Johnswort evergreen?
It is semi-evergreen, keeping its foliage in mild climates but may die back in colder winters.
Is it good for erosion control?
Yes, its spreading roots and dense foliage make it excellent for slopes and soil stabilization.
Does it attract pollinators?
Yes, its golden blooms attract bees and beneficial pollinators during summer.
How fast does it spread?
It grows and spreads quickly, forming dense mats that suppress weeds and cover ground effectively.