18 - 24 Inches
USDA Hardiness Zones
4 - 8
April - August
Mounded plants with attractive foliage that is fragrant and spikes of blue flowers. Thrives in heat and and drought tolerant once established. Loose habit and can spread. Good border plant.
Moist well-drained soils in full sun
'Blue Wonder' 12-18 inches tall, blue flowers
'Dropmore' 10-12 inches tall, blue flowers
'Walker's Low' 18-24 inches tall lavender flowers
'Snowflake' 10-12 inches tall, white flowers
'Six Hills Giant' 2-3 feet tall, light blue flowers
Cut back by half after flowering to maintain clean gray foliage. Seldom needs dividing.