This guide provides recommendations for the germination of over 8800 seeds listed in the seed exchange of the Ontario Rock Garden & Hardy Plant Society between 1995 and 2023. For each species, a single germination technique has been chosen from several successful approaches for dry seed stored 6 months @ 20°C, except where noted.

While this data is based primarily on the experience of ORG&HPS members, we have also relied extensively on methods described by Norman Deno (Seed Germination Theory and Practice), Dr. Pavel Slaby ( ) Tom Clothier ( and Gene Mirro, an authority on lilies. We are continuing to collect complete data on many species.

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