Hypericum calycinum (St. John’s Wort)
St. John's Wort, Aaron's Beard, Rose of Sharon, Resurrection Plant, Large-Flowered St. John's Wort, Creeping St. John's WortHypericum calycinum, commonly known as Aaron’s Beard, Creeping St. John’s Wort, or Rose of Sharon (in some regions), is a low-growing, spreading shrub that is both hardy and visually striking. Belonging to the Hypericaceae family, this deciduous plant is prized for its ability to blanket landscapes with vibrant foliage and cheerful blooms, making it a popular choice for ground cover. It produces large, showy yellow flowers, about 2–3 inches in diameter, throughout the summer. Each flower boasts five broad petals and a dense tuft of golden stamens, creating a striking, rose-like appearance. The oval, semi-evergreen leaves are bright green in sunny spots but can take on a lighter yellow-green hue in shaded areas. In fall, the foliage may display hints of bronze or purple, offering seasonal interest.
This shrub typically grows 12–18 inches tall and spreads vigorously through underground stolons, making it ideal for erosion control or covering challenging areas like slopes, embankments, or under trees. Hardy in USDA zones 5–9, it thrives in full sun to partial shade and adapts to a variety of soil types. While drought-tolerant once established, it performs best in moist, well-drained, moderately fertile soil. Its versatility and low-maintenance nature make it a practical choice for gardeners.
Care Instructions
- Light: Prefers full sun to partial shade; flowers best in sunny spots.
- Soil: Thrives in well-drained, moderately fertile soil but tolerates sandy or loamy conditions.
- Watering: Requires moderate watering; drought-tolerant once established but benefits from occasional watering during prolonged dry spells.
- Fertilization: Does not require heavy feeding; a light application of balanced fertilizer in spring can boost growth.
- Pruning: Cut back the foliage in late winter or early spring to rejuvenate the plant and encourage fresh growth.
- Winter Protection: Mulch in colder regions to protect roots.
Hypericum calycinum is perfect for gardeners seeking a low-maintenance, attractive ground cover. Its vibrant flowers, hardy nature, and adaptability ensure it remains a favorite for adding beauty and practicality to a wide range of landscapes.
