gardening,flowers Bloom color: Pink, Rose/Mauve, Violet/Lavender Sun requirements: Full Sun Cold hardiness: Zone 3a to Zone 8b Height: 24-36 in. (60-90 cm) Spacing: 12-15 in. (30-38 cm), 15-18 in. (38-45 cm), 18-24 in. (45-60 cm) Photo copyright Cheesy at Dave's Garden.