Bees love this one. It is HUGE. There are always multiple blooms on it. The blooms keep coming all through frost. I like how it's darker towards the center. This is why I prefer my seed grown plants to the store bought "mutants". Those test tube Echies just don't cut it!
It's fun. Just pick two plants you like by each other. Save seeds from both and plant. You will get some very nice plants. It's cheap too. Get some tennesseensis and paradoxa to go with the others. Sometimes you have to save seeds from the first offspring to get the orange, yellow, and red.
When you plant the seed from these plants, does the seed need to be stratified? If so, maybe how long and can the seed (without dirt) be put in the refrigerator in an airtight container? Or can you just get seed from a coneflower, which I haven't done before either and let the seed dry and then plant it?
I've only planted boughten coneflower seed. It didn't need the stratification.
What I'd do is save seeds from some of your plants after the stem starts to turn brown under the cone. They are like picking out sunflower seeds. Store them in the refridgerator in a zip lock baggie. This winter, winter sow them. Have you winter sowed before? If not, check out that forum for instructions. It's the best way to plant them by far.