Surface sow and press in lightly.
Sow 8-10 weeks before planting out after last frost. Keep at about 70°F until germination, then lower to 60-65F.
Direct sow at last frost date to early summer.
WHEN TO SET OUTSIDE
In spring, after last frost.
PLACEMENT & CULTIVATION
The frilly pompon pure-white flowers of Achillea 'Double Diamond' are excellent as cut flowers. This variety spreads modestly, sending out roots that run just under the surface. To renew this short-lived perennial, it's recommended to divide it every three years. It's a valuable low-maintenance perennial for garden edges and mid-borders in wildflower, cut-flower, and cottage gardens. The flowers attract pollinators, and the aromatic leaves repel deer and rabbits. However, they may also cause skin irritation, so handle with care.
While somewhat drought tolerant, this plant does best with added water during dry spells. Do not over water.
Prefers acidic to neutral soils.
Mix in about 2" of compost prior to planting. Apply a thin layer of compost each spring. Do not over-fertilize, as this will cause floppy, leggy stems.
Diseases & Pests:
No major pests or diseases. Powdery mildew and root rots are possible in shady, wet conditions.
When to Cut for Bouquets:
Harvest when flowers are fully open.