Aaron's beard, Creeping St. Johnswort (Hypericum calycinum)

Quick facts and care essentials

• Evergreen shrubby ground cover
• Zones 3-24, 31-34
• Full sun, partial shade, or full shade
• Moderate water

Good looking and indestructible, Aaron's beard forms a dense, even cover to 1 foot high. The arching stems bear pairs of 4-inch, oval leaves that are rich green in sun, yellow green in shade. Showy, 3-inch-wide yellow flowers that look rather like single roses bloom from late spring to early summer.

The plant spreads aggressively by underground stems and may invade other plantings unless confined by a barrier. It takes poor soil, competes well with tree roots, and helps prevent erosion on sloping ground. To renew growth and maintain an even surface, mow or shear plantings about every 3 years in late winter or early spring. Space 1 1/2 feet apart.