Achillea millefolium - Yarrow
Evergreen perennial to 1-2 ft tall by 2-3 ft wide. Fern-like green leaves with clusters of white flowers in spring and summer. Excellent nectar source for butterflies and other pollinators. Deep root system, great for erosion control. Many traditional medicinal uses. Full sun to part shade. Tolerates low water, looks best with supplemental water, especially in summer. Tolerates sand soils and clay soils. Hardy to 0º F.