Achillea millefolium  'Apple Blossom' Yarrow offers numerous, long lasting tiny flowers early to late summer. Preferring full sun, it spreads rapidly reaching up to 2 - 3 feet tall. They are good for mass plantings and general garden use. Perennials that are heat and drought tolerant, they are attractive to bees, butterflies and birds. Water regularly in the first year to establish a strong root system and divide every two to three years.