Direct sow ¼-inch deep in full sun. Keep seeds moist the first few days, then water moderately or as needed.
To save the seeds:
Let the flower heads dry on the plants. Harvest entire flower head and remove seeds, dry well.
Planting your saved seeds: Save seeds from 5-10 plants. If stored when completely dry in airtight, cold, dry conditions seeds can be viable for 4-6 years.
Social Roots 