|Clump-forming and compact, this carefree and generously blooming perennial is great for summer blooms. Reaches 30 inches tall and about 24 inches wide. Leaves are mid-green and linear, broad, and 2-pinnate. Flowerheads form corymbs 4 to 5 inches across in creamy white, which darken with age. This heat and drought tolerant perennial has a fiberous root system and can become invasive. Divide to maintain. Butterflies are attracted to this plant. Good cut flower that dries, well too. Sometimes referred to as Achillea 'Great Expectations'.