Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 175.
Sunset®: All zones
USDA: 3-8
Sun Exposure: Full sun to part shade
Origin: Southern Europe to Siberia
Growth Habits: Short lived perennial, 1 to 3 feet tall (30-90 cm), 1 to 2 feet spread (30-60 cm); older plants become woody at the base
Flowers: White or violet flowers
Watering Needs: Regular water, well-drained soil
Propagation: Seeds, self sows
Classified as invasive in several states.
Blooming Habits:
Lavender to purple scented flowers (some forms are white), 0.5 inch in diameter (1.2 cm) in late spring to late summer.
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