I'm interested in this as well. However all of my intersectional peonies have been too small to bloom thus far. Maybe this year I'll get some blooms. Have you tried your hand at fertilizing one?

Dave,

I am not aware of any intersectional X intersectional crosses. I know that there have been successful herbaceous X intersectional crosses. I understand that none of the resulting seedlings have yet bloomed.

These crosses involved the pollen of only two different intersectional. As I recall those two pollen parents were Garden Treasure and Sonoma Rosy Future.

There have been reports of one or two of the intersectional peonies setting a seed but generally those seed are hollow and will not germinate.

Leon

Roger Anderson produce Hillary from open-pollinated Bartzella but so far they have proved to be very infertile rarely setting seed.Some peonies grown from seed show no fertility when young but as they mature they produce some seed or pollen.Hopefully someone can produce some F2's that will be fertile.

Good to hear that at least one F2 already exists; Hillary should be fertile when it matures.