Genus of 30+ species of clump-forming herbaceous perennials, shrubs and subshrubs (tree peonies). Native to Europe, Asia and western North America. Most cultivars are derived from P. lactiflora and bloom in late spring through early summer.
Peony flowers grow in several forms: single, semi-double, double (including the 'bomb-type' with a central mound of petals) and Japanese (also known as anemone-form). Peonies prefer cold nights and warm days -- and grow very well in the temperate coastal climate of the Pacific NW.
Mid-May through early July.