Hypericum, commonly known as St. John’s Wort, is a genus of flowering plants in the family Hypericaceae, comprising around 490 species. The genus has a widespread distribution, native to temperate and subtropical regions of the world, with particular diversity in North and South America, Europe, Asia, and Africa.
Size: Hypericums have diverse growth habits, from ground-covering varieties to shrubs and small trees. They typically range from 1 to 5 feet (0.3-1.5 meters) in height and spread, though some tree-like species can reach up to 20 feet (6 meters) tall.
Flowers: These plants are noted for their bright yellow flowers with a profusion of prominent stamens, creating a burst of color in the garden. The blooms are often star-shaped and appear in summer, sometimes continuing into early fall.
Hardiness: Hypericum species are generally hardy from USDA zones 5 to 9, although some can tolerate colder or warmer climates. They enjoy full sun to part shade and well-draining soil.
Pollinators: The flowers attract bees, butterflies, and other pollinating insects.
Uses: St. John’s Wort is used extensively in landscaping due to its vibrant flowers and attractive, often semi-evergreen, foliage. Some species are employed for their medicinal properties, notably Hypericum perforatum, used in treating mild to moderate depression. Furthermore, Hypericums are excellent choices for borders, rock gardens, or as ground cover, particularly for erosion control on slopes.