Getting a peony seed to flower takes 3-5 years (even up to 8 with tree peonies I have been told), that's first flower. I have heard that it needs ten years or so after that initial flowering to make enough divisions to sell as an offering. Sounds like Johnson may have some interesting peonies. Look forward to that day.
Peony seed advice:
Don't put off starting until "tomorrow", do it today
It brings you a day closer to bloom day. You'll be glad you did.