- A tight mound of thick, satiny, blue green foliage. Streaked with white, cream, golden yellow, and celadon. Variegation is unstable so division of the clump is necessary as soon as the streaking starts reverting, removing the reverted side. Funnel shaped pale lavender flowers in midsummer. Matures 18 inches high and 36 inches wide. Zones 3-9.