If you plant too deep the plants take a longer time to bloom. Your peony is growing roots in the fall so be sure to supply additional water if the season is dry. You can mulch your peony the first season it is planted with straw or oak leaves after the ground is slightly frozen. You must remove this mulch early in the spring to prevent the shoots whish emerge early in spring from rotting, especially if it is a wet spring. The flower shape of doubles may be single or semi-double the first bloom season, but the color should be correct.
Some varieties are faster to get established than others so be patient.
These plants are known to last more than 150 years, so let them settle in at least five years before moving them again. Fertilize the plants when they are 3 - 4 inches tall and keep the weeds away from the plants. Wood chip mulch works fine. Don't cut a long stemed flower from plants until they are at least three years old. Never cut the foliage down until after a hard frost or better yet in the spring after the snow is gone.