Linwood Gardens: Private garden in New York featuring a significant collection of tree peonies. Information about the open days, and photos of the tree peonies of Japanese and American origin.
Peonies for the Home Landscape - North Carolina Cooperative Extension: Cultivation resource including variety selection, planting requirement, maintenance, and advise for common problems.
Peonies...Our Last Passion: Large collection of links to sites or articles about peonies as well as public and private gardens, nurseries, paintings of peonies, books, and cultural information.
Peonies: Queen of the Garden Flowers: Article about the history, mythology, breeding, and cultivation of herbaceous garden peonies. Tips about care and selection, and descriptions of varieties.
Peony Garden: Australian growers of primarily tree peonies present background information on plants and breeding, photos of their hybrids, and links to articles.
Peony Lady: Australian grower Elisabeth Rundle presents background information, photo galleries, FAQ, and links.
The Website From Peony Friends For Peony Friends: Collection of articles and reference information on garden peonies - from history to hybridizing techniques.
The Wonderful World of Intersectional Peonies: Dedicated to hybrids of herbaceous and tree peonies, with many photos and some descriptive information.
Yahoo Groups: Peony: International interest group for discussions and sharing photos and reference information. Includes list of peony resource links. Must join group (free) to access information.
Yahoo Groups: PeonyPlus: Members share messages, files and photos, and trade plants.