This guide provides recommendations for the germination of over 8000 seeds listed in the seed exchange of the Ontario Rock Garden & Hardy Plant Society between 1995 and 2021. 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.

Please send additional information about germination or suggestions for improving this guide to This email address is being protected from spambots. You need JavaScript enabled to view it.