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USDA Hardiness Zones
3 - 8
July - August
Unique blue-gray foliage and steel blue globe shaped flowers. Foliage looks like thistle. Foliage offers dramatic contrast in the garden.
Prefers well-drained soil in a full sun location
Drought tolerant once established. Very light shade during the hot part of the day may help retain good foliage quality. May reseed and spread. Needs very well-drained soil to overwinter successfully.