Single, or Chinese, peonies have one row of broad petals that surround a cluster of yellow, pollen bearing stamens. Other flower types have central petals in the place of stamens. Peonies bloom in May and June. Colors are white, yellow, cream, pink, rose, and deep red. Tree Peonies Tree peonies produce many flowers on a single shrublike plant.
Colors are yellow, pink, white, rose, crimson, scarlet, black, and purple.
The centers of the flowers are yellow, pink, or red. Petals are mottled at the base. The stems of these peonies stay alive all winter. They are less common than garden types. Many varieties of tree peonies have been developed.