Proudly serving Canadian gardeners for over 125 years.

OSC Seeds is the largest Canadian owned and operated packet seed company, offering a full line of products including over 30 herbs, 250 vegetables, 240 annuals, and 100 perennials and biennials suitable for Canada’s various climates.

Our fifth-generation family business has over 125 years of growing history and is proud to be wholly Canadian-owned and operated. From our central facility in Kitchener, Ontario, we ship from coast to coast across Canada.

If you have any questions about our products, please contact us by filling out your information below. We would be happy to help!

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OSC Seeds Head Office, Production Facility & Online/Mail Order Department

Mail Address
PO Box 7

Waterloo, ON
N2J 3Z6

Physical Address
77 Wellington Street South
Kitchener, ON
N2G 2E6

(519) 886-0557 or 1-800-465-5849
Fax: (519) 886-0605


Monday to Thursday 8:00 AM – 4:30 PM

Friday 8:00 AM – 3:00 PM

Ontario Seed Co. Retail Store

16 King Street South
Waterloo, Ontario
N2J 3Z6

Free parking is available at the rear of the store on Regina Street

(519) 886-2990


Monday to Friday 8:30 AM – 6:00 PM

Saturday 8:30 AM – 5:00 PM