Yarrow Achillea millefolium Photo/Illustration: Jennifer Benner 1 2 3 4 5 6 7 8 9 10 11 Yarrow (Achillea millefolium) ah-KILL-lee-ah mil-lih-FOE-lee-um Genus: Achillea This rhizomic, mat-forming and aggressive perennial frows to 2 feet tall and wide with ferny, finely-textured, green foliage. Flowers are produced in flat corymbs in early to late summer. Noteworthy Characteristics: Naturalizing wildflower with numerous improved cultivars. Fairly vigorous, tough plant. Care: Provide well-drained soil in full sun. Divide regularly to maintain vigor. Propagation: Sow seed in situ or divide plant in spring. Problems: Aphids, powdery mildew, rust. Overview Height 1 ft. to 3 ft. Spread 1 ft. to 3 ft. Growth Habit Clumps Growth Pace Invasive/Aggressive Grower Light Full Sun Only Moisture Dry to Medium Maintenance Low Characteristics Attracts Butterflies, Showy Flowers Bloom Time Early Summer, Late Spring, Spring, Summer Flower Color Pink Yarrow, Red Uses Beds and Borders, Cut Flower Style Cottage Garden, Herb Garden, Meadow Garden, Rock Garden Seasonal Interest Spring Interest Type Perennials Achillea millefoliumView the discussion thread.