Seeds need 'cold stratification' (a cold, moist period) before they will germinate. Do this by sowing the seeds outside late summer, fall, or winter (before March 1st). Alternatively, in March, mix the seeds into 1/2 cup of moist (but not too wet) sand, peat moss, or seed starting mix. Then place in a sealed plastic bag and put in the fridge for 30 days mimumum. After the cold stratification period, seeds can be started inside or outside. Plant the plants in well-drained soil in full sun.
For cut flowers, harvest the flowers as they begin to open and place them in water.
Collect dry pods before they begin to lose their fluff. Dry the pods inside. Split pods open and pull out the seeds and fluff.
Our Recommendations with Butterfly Milkweed Wildflower