Q.When Is Best Time and How to Transplant Peonies
My peonies didn’t bloom. Where is the best location to transplant them, and when?

Certified GKH Gardening Expert
Peonies hate to be transplanted and can take years to bloom after transplanting. In fact, it may take them a year or two before they recover from transplant shock. However, if you really want to move them, early fall is a good time to dig up or transplant peonies. Make sure you get as much of the root system as possible and replant in a sunny location in well-draining soil. Keep them watered as the roots establish. This article will help with peony care: https://www.gardeningknowhow.com/ornamental/flowers/peony/peony-care.htm
If you already have them in a suitable location but are simply having blooming issues, your soil could be lacking phosphorus, which is responsible for flowering. Try adding a phosphorus rich fertilizer or bone meal to the soil around your plants and see if this helps.