The tree peony grows to a height of four to six feet. Most gardeners have greater success growing the herbaceous peony rather than the tree form. Garden peony flowers are grouped according to the shape of the petals. There are many varieties within the various types. By selecting different varieties, the flowering period can be spaced over a longer period of time.
Peonies are relatively easy to grow.
They do the best in well-drained soils. Select a site that receives six to eight hours of sunlight per day. The plants will grow and produce good foliage in shady locations, but they will not produce as many flowers. Also, plant where there is good air movement to reduce the chances of having disease problems. Garden peonies are generally planted during September.