Aaron's Beard, Creeping St. John’s Wort

Frost Tolerance: Occasionally killed to the ground in winter in Zone 6

Sun Exposure: Sun to shade

Origin: Southeastern Europe, Middle East

Growth Habits: Perennial semi-woody groundcover, 12 inches tall (30 cm), 18 inches spread (45 cm)

Flowers: Yellow flowers

Watering Needs: Moderate water, takes some drought, likes sandy soil

Propagation: Rooted stem cuttings, crown division. Spreads by underground stems.

Hypericum calycinum in Curtis Botanical Magazine

The genus name Hypericum means "above a picture", referring to the fact that in some ancient cultures, it was hung above pictures to ward off evil spirits. The name calycinum comes from the Latin for 'with a conspicuous calyx'.

Blooming Habits:
The Aaronsbeard St. John’s Wort has 3 inches in diameter (7 cm) bright canary yellow flowers that contrast with the dark green foliage. Each flower lasts one to two weeks. It blooms mostly in June and July, and sporadically most of the summer.

Culture:
Cut the tops every other year to avoid for it to look bedraggled in late summer. Can be invasive if not confined. It prefers sandy, alkaline soils.
The Aaron's Beard has virtually no disease problems.