600 RED YARROW Achillea Millefolium Rubra Flower Seeds BLOOM TIME: May - Nov HARDINESS ZONE: 3 - 10 (and reseeds itself easily) PLANT HEIGHT: 12 - 24 " . . . PLANT SPACING: 12 - 15" LIGHT REQUIREMENTS: Sun - Part Shade . . . SOIL / WATER: Average - Dry Yarrow has fragrant 2-4 inch flower heads made up of lots of smaller flowers for a wonderful look. It attracts bees, butterflies, and birds.