Achillea millefolium occidentalis##
HOW TO GROW YARROW, WESTERN
Start indoors 4-6 weeks before last frost, direct sow in sunny location after frost, requires little water. Prolong by division in the spring every other year. Will spread by self-seeding. Surface sow, press into soil, do not cover. Soil pH 5.1-7.8. Hardiness zones 3-10...