ONTARIO DAYLILY SOCIETY
A non-profit organization whose main purpose is to promote and educate the gardening public about daylilies.
Annual membership: $15 single, $20 family
Email: president@ontariodaylily.on.ca
Website: www.ontariodaylily.on.ca

 ONTARIO DELPHINIUM CLUB
Promotes the growing of English Delphiniums from open and hand pollinated seeds. Five colours are available. Annual family membership includes a package of free open pollinated mixed seed and 4 newsletters. 4691 Highway 7A, RR1, Nestleton, Ontario, L0B 1L0
Annual membership: $10
Contact: Christine Gill
Email: ontdelphs@yahoo.ca
Website: www.ondelphiniums.com

 ONTARIO HORTICULTURAL ASSOCIATION
Umbrella organization for 278 local societies. Major activity is the annual convention held in August. Box 449, Englehart ON POJ 1HO.
Tel: (705) 544-8916, Fax: (705) 544-8916
Email: president@gardenontario.org
Website: www.gardenontario.org

 ONTARIO HOSTA SOCIETY
Specializing in hostas. 4 Rayburn Court, Bolton, Ontario L7E 0A8.
Contact: Sandra Shrieve, Tel: (866) 742-7155
Annual membership: $15
Email: membership@ontariohostasociety.com
Website: www.ontariohostasociety.com

 ONTARIO ROCK GARDEN SOCIETY
A chapter of the N.American Rock Garden Soc. promoting rock gardening with lectures, journal (10 issues) plant sales, seed exchange, garden visits, etc. Meets at the Toronto Botanical Gardens, 777 Lawrence Ave E, N. York usually on the 2nd Sun of the month at 1pm. Sept-May. Next meeting: Sunday, May 28. Plant sale begins at noon. 1:30pm -Kevin Hughes speaks about 'Plants & Shrubs Hardy to Ontario'. Contact: Anna Leggatt 416-755-2325
Annual membership:$20 individual, $25 family, $25 overseas
Email: torqsted@sympatico.ca
Website: www.onrockgarden.com

 ONTARIO WATER GARDEN SOCIETY
Meets six times a year at the Japanese Canadian Cultural Centre, 6 Garamond Court (Don Valley Pkwy & Eglinton Ave. East) with one or two garden tours and a plant sale in June. 4691 Highway 7A, Nestleton, Ontario, L0B 1L0. Guests are always welcome. For further info call Jake Doehler 416-438-4862.
Annual membership: $20 includes 6 newsletters
Email: grdnpond@yahoo.ca
Website: www.onrockgarden.com

 ORCHID SOCIETY, ROYAL BOTANICAL GARDENS
Monthly meetings cover orchid culture, new world species, maintaining display collection at RBG, Alex Parker Flasking Lab for Orchid Species, propagation and native orchid study group. Meetings every 3rd Sunday 2pm.
Annual membership: $15
Website: www.osrbg.ca

 OSHAWA GARDEN CLUB
Meets at Northminster United Church, Rossland Road at Simcoe Street, at 7:30pm the second Monday, January through June, September through December.
Contact: Bonnie White
Email: bonnieeawhite@yahoo.ca

 PICKERING HORTICULTURAL SOCIETY - District 17
Meets on the second Tuesday of each month, starting at 8:00 p.m. at the Pickering Recreation Complex, 1867 Valley Farm Road, O'Brien Room at rear. (Some exceptions do apply so check Activity Dates for details.) Anyone who is interested in gardening and plants, whether trees and shrubs, flower beds, vegetables, houseplants, floral arrangement or the environment is invited to join.
Email: dsonego@sympatico.ca
Website: www.pickeringhorticulturalsociety.com

 PRAIRIE PEONY SOCIETY
Promotes knowledge of peonies and their culture, holds educational meetings and an annual show in Regina, SK, and publishes a newsletter 3 times a year.
Annual membership: $10
Contact: Brian Porter, President
Email: bjporter@agr.gov.sk.ca
Website: icangarden.com/clubs/regina%20ps/