Direct sow ½” deep after danger of frost or transplant starting 6 weeks before last frost. Thin plants to 12.” Prefers 60-70°F soil temp. Germination in 10-14 days.
Collect seeds from seedheads that are fully dry. Shell by hand or by dancing, and winnow to clean. Finish air-drying if necessary before sealing in airtight container. Some cross-pollination may occur, isolate from varieties of the same species by ¼ mile.