Hypericum scouleri, commonly known as Scouler’s St. John’s wort, is a perennial herb native to moist meadows, streambanks, and forest clearings in western North America, from British Columbia to California. It typically grows up to 1 meter tall and can spread to form clumps. Scouler’s St. John’s wort has erect stems with oblong to linear leaves and produces clusters of bright yellow flowers with numerous stamens from late spring to early summer. The flowers are showy and attract a variety of pollinators.

This species is valued for its ease of maintenance and adaptability to a range of garden settings. It is often used in native plant gardens, restoration projects, and as a border plant due to its attractive foliage and flowers. Scouler’s St. John’s wort prefers moist, well-drained soils but can tolerate occasional dryness once established. It thrives in full sun to partial shade and is generally free from serious pests and diseases. However, it can be susceptible to root rot in overly wet conditions.CC BY-SA 4.0