Hypericum kalmianum #5

Hypericum kalmianum

Kalm’s St. John’s Wort

Kalm’s St. John’s Wort is a tough, compact native shrub valued for its cheerful summer flowers and adaptability to challenging sites. In early summer, bright yellow, star-shaped flowers with prominent golden stamens cover the plant, attracting pollinators and adding vivid color to the landscape. Blue-green foliage forms a dense, rounded mound through the growing season before turning yellow in fall. Naturally occurring along lakeshores and open prairies, this Illinois native thrives in full sun and well-drained soils and tolerates heat, wind, and poor soils. Once established, it is notably durable and low maintenance, making it an excellent choice for mass plantings, foundations, and tough landscape areas.