Herbaceous Perennial: Showy fully doubled lavender/pale blue petals with a light yellowish green inside and sturdy upright stems. Height: 26-32". Width: 12-18". Tolerates clay/chalky soil. Water: moderate. Exposure: full sun/ partial shade. Looks great in borders and as cut flowers. Attracts Hummingbirds and butterflies. Bloom time: spring-summer. USDA Z3.