Hypericum pulchrum aka Slender St. John's Wort

Hypericum pulchrum is a herbaceous perennial in the Hypericaceae family. Its common names include slender St John's wort and eurinllys mân syth. It comes from Europe and is native to Britain and Ireland. It grows upright and loses its leaves each year. This is a small plant, rather than a tall shrub. Its slim form suits informal planting among other low plants.

Plants reach about 1–1.3 feet [0.3–0.4 metres] in height. The RHS gives an upper garden height of 1.6 feet [0.5 metres]. Its listed spread also reaches 1.6 feet [0.5 metres]. Plants take one to two years to reach their full size. Small green leaves grow in pairs along the stems. Orange buds open into gold-yellow flowers with red stamens. These contrasting colours give the flowers detail despite the plant's small size.

Grow this species in full sun or partial shade. It accepts chalk, clay, loam, and sandy soils. Good drainage matters more than the soil's texture. Acid, neutral, and alkaline soils all fall within its stated range. The RHS lists it for sites facing any direction. Both open and sheltered sites can suit it. Its UK hardiness rating is H6. This rating covers winter lows of about −20 to −15°C. The RHS classes H6 plants as hardy across Britain and northern Europe.

The RHS suggests it for cottage gardens and other informal schemes. It also lists prairie planting, wildflower meadows, and wildlife gardens. Its small size makes it an option where taller plants would dominate. No routine pruning is needed. The RHS reports few usual problems with pests or disease. Gardeners can raise new plants from seed. They can also divide plants in spring. Another option is to take semi-ripe cuttings during summer. These methods offer several ways to build up a planting.

Treat this plant as ornamental, not as a food crop. The RHS warns people not to eat its fruit. It gives the same warning for pets. Wear gloves and other protective gear when handling the plant. These cautions matter when choosing a site near children or animals. The supplied sources give no edible uses for this species. They also give no species-specific medicinal uses.