Western Yarrow (Achillea millefolium occidentalis) - Herbaceous perennial that blooms clusters of white flowers in late spring. 
 
Growth: Can grow up to 3 feet tall.
Light: Full sun.
Soil: Needs well-drained soil.
Hardiness: Very drought-tolerant
Maintenance: Low maintenance & aggressive self-seeding. Avoid over-watering to avoid root rot. Deadhead for longer blooming period.
Benefits: Attracts pollinators & other wildlife.