Harvesting coneflower seeds is simple. It starts with deadheading spent flowers and drying them out.
For seeds you've collected, emulate winter's cold to trigger dormancy. A month in the fridge should do!
If harvesting isn't for you, buy seeds! They're pre-stratified and ready to sow following package instructions.
Start seeds 8-10 weeks before the last frost. Use a seed starting kit or small pots and keep soil moist.
Once sprouted, move seedlings to a sunny spot. Fertilize lightly and watch for root growth.
Plant seeds directly in the ground once it's thawed. Keep soil moist but avoid overwatering.
Harden off seedlings before planting them in a sunny garden spot. Water regularly until established.