Wildflower Seed - Grey Head Coneflower - $20 (SoCo StL)

Missouri native wildflower (native = hardy) gets 3-4 feet tall and blooms May-Sept, attracting birds & butterflies.
I collected the seed from my back yard.
It weighs .
8 oz (without container) which is enough for a very, very large space.
Sow the seed now (read about seed stratification to understand).
Grow in average, medium moisture, full sun.
Prefers clay or sandy soils and tolerates poor, dry soils.
Reference Missouri Botanical Garden plant finder or Missouri Dept Conservation field guide for more detail.
Message with serious interest and desired pick-up time near South Lindbergh and Hiways 55-270-255.
Cash only, exact change please.
Thank you!