shrub, groundcover

Hypericum calycinum | Mounding St. John's Wort, Aaron's beard

Fast, aggressive growth makes St. John's Wort a worthy groundcover, including slopes for erosion control. Provide afternoon shade and regular summer water in warm summer regions. It roots rapidly by underground stems, so it can be invasive. Cut back dormant plants for renewed growth in spring. It often dies to the ground in cold-winter regions. Canopy coverage: 3 square feet.

Water Requirement: moderate

Sun Exposure: partial shade

Cold Hardiness: cold hardy to -10F

Growth Rate: fast

Height: 1 feet high

Width: 2 feet wide

Evergreen, Semievergreen

Foliage Color: medium green

Flower Color: yellow

Flower Season: summer