New Vintage White Achillea is an evergreen perennial with pure white flower heads summer through fall. Compact, clumping grower at only 12 to 14 inches tall and 10 to 12 inches wide, this yarrow can be used as a lawn substitute – mow before it flowers. Great for containers or borders and rock gardens in full sun. Attracts butterflies and can be used as a cut flower or for dried arrangements. Also drought tolerant and deer resistant as well as tolerant of clay or poor soils. Hardy to -25F, USDA Z4-9.