I have two peonies in two small whiskey barrels and a peony that became overcrowded in the garden. I live in Anchorage Alaska. Fall is quickly approaching and I need to know how to winter it. I can use all the help that I can get. First peonies! Help! Thank you.
You can transplant them into the ground in the fall. Here is how:
https://www.gardeningknowhow.com/ornamental/flowers/peony/moving-established-peonies-2.htm
I love to garden and have lots of different ornamental plants, not any veggies yet
This would be Powdery Mildew. This fungus is quite widespread, and unavoidable. I would advise treating with the fungicide of your choice. These articles will help:
https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
https://www.gardeningknowhow.com/ornamental/flowers/peony/powdery-mildew-peonies.htm
This collection of articles will help with the care of Peonies:
Your article on growing peonies from seed included Itoh varieties. I thought they only produced sterile seeds?
Most are, but some of them will germinate with extreme patience. You can treat them like other Peony seeds. Keep in mind that they will not likely be true to seed or resemble the parent plant.
This collection of articles will offer more information on Peonies: