Blue Vervain is a tall, elegant perennial that is a must-have for any pollinator-focused wetland or meadow project. It is easily identified by its candelabra-like spikes of tiny, deep violet-blue flowers that bloom from the bottom up throughout the summer. Reaching heights of 2 to 6 feet, it adds a vertical pop of color to the landscape from July through September. This hardy species is native across North America and is most at home in moist to wet soils and full sun, though it can tolerate partial shade. It is a true powerhouse for biodiversity, attracting an incredible variety of butterflies, moths, and native bees, while its seeds provide a late-season feast for songbirds. Blue Vervain is easy to establish from seed and is known for its resilience and ability to thrive in heavy clay soils. Whether used in a rain garden or a traditional perennial border, it provides long-lasting beauty and exceptional ecological value.

Quick facts

• Height: 2–6 ft
• Sun: Full to Partial
• Soil moisture: Wet to Medium
• Bloom time: Jul–Sep (Blue)
• Life cycle: Perennial
• Native range: Native to 49 states, including Iowa, Minnesota, Wisconsin, Illinois, Missouri, Nebraska

See the full growing guide and county range map for Blue Vervain