Barely cover (about 1/16").
Sow in early spring, 3 weeks before the last frost, and sucessive sow at last frost date in moderate summer areas.
PLACEMENT & CULTIVATION
Sweet sultan is an old-fashioned honey-scented flower described in the 1600s by an English herbalist as a "stranger of much beauty lately from Constantinople." At home in the cottage garden and cutting garden, its soft thistle-like flowers keep blooming if deadheaded or cut for bouquets regularly. Site in well-drained soils. Performs best in cool to moderate summer areas.
Drought tolerant once established. 1" of water per week initially, then water during dry spells.
Neutral to slightly alkaline
Mix in a few inches of compost and some lime prior to planting.
Diseases & Pests:
Avoid fungal troubles by placing in a location that has good air circulation.
When to Cut for Bouquets:
Harvest when flowers are beginning to open.