Blue Vervain
Herbaceous perennial growing 90-150 cm tall. Features lance-shaped, opposite leaves and slender spikes of small, blue-violet flowers blooming July-September. Prefers moist soils and full sun. Attracts butterflies and supports native bees. Suitable for rain gardens, wet meadows, and pond edges. Self-seeds readily in ideal conditions. Native to most of North America.
Plant Details
Bloom Colour: Purple to Blue
Bloom Time: Mid-Summer to Fall
Sun Requirements: Sun to Part-Sun
Moisture: Moist to Wet
Phenology: Growth emerges May. Leaves fully developed by June. Blue-purple flower spikes appear July-September. Seeds mature September-October.
Wildlife Value: Excellent nectar source for butterflies and native bees; seeds eaten by birds; deer resistant
Habit Over Time: Creates upright clumps that self-seed readily but do not spread aggressively through rhizomes. Individual plants maintain clear boundaries while the strong vertical elements provide good structure. The stems emerge with enough space between them to allow good integration with neighboring plants.
Height: Medium to Tall (2-5 feet)