Start indoors 4/15 at 55-70°F. Seed planting depth: 1/16". Days to germination: 10-15. Transplant or direct sow outside after last frost (5/21). Plant spacing: 12-18". Full sun.
Harvest flowers for dye or cut flowers when they are open. Cutting flowers (deadheading) will make plants flower for a longer time period.
Harvest seeds when seed heads are dark brown and dry.