Perennial: This is classified as a perennial but should be treated as an annual. Features airy clusters of white flowers mid spring to mid fall. The flowers are excellent for cutting. Its small oval leaves remain green in color throughout the season. Provides interesting contrast & texture in mixed plantings. Great in containers, border & hanging baskets. Blm color: white. Ht: 12-20". Width: 10-12". Exp.: sun/pt shade. Water: mod./dry. Z10