Some nurseries also offer seedlings that are unnamed, so it's best to buy those when they are blooming so you can choose the colors you want. Peony Planting Pointers Location Peonies do best when tubers are planted in early fall, but will also thrive if planted in early spring. If you purchase peonies that have been grown in containers, they can be planted in your garden any time from early spring to early fall. Location is of utmost importance as peonies don't like to be disturbed after planting, and will thrive for years in the same place with proper care. Select a site where they will receive at least six hours of sunshine a day, although they will tolerate some shade.
Peonies are unable to withstand strong winds, especially when they are heavy with blossoms.
So choosing a sheltered area is a wise move early on. For optimum growth and blossom production, peonies prefer soil having a pH of 6.5 to 7.5. Tubers that appear soft, rotting or otherwise diseased should be avoided. Planting deeper may prevent them from blooming during their first year. If planting in early spring, water on a regular basis throughout the summer.