seed vernalisation

[John85]

How to know if a species need vernalisation or not?Is there a book about this?Some lists somewhere?
I have the Jellito information but there are plenty of species that are not mentioned.
Thank you for your help

[Diane Clement]

How to know if a species need vernalisation or not?Is there a book about this?Some lists somewhere? 

I think the most useful guide is on the Ontario Rock Garden site.  They have an A - Z listing of plants and germination codes mostly derived from the work of Deno, plus some information from their members, I think.  "While this data is based primarily on the experience of ORGS members, we have also relied extensively on methods described by Norman Deno (Seed Germination Theory and Practice), Dr. Pavel Slaby ( www.kadel.cz/flora ) and Tom Clothier ( http://tomclothier.hort.net)"

http://www.onrockgarden.com/page/germination-guide-overview
http://www.onrockgarden.com/germination-guide/plants
It's a slightly oddly designed site, the Germination Codes are in the left panel, A - Z of species in the right panel but works well.

[David Pilling]

Professor Deno's books on seed germination are now available online. See:

http://www.srgc.org.uk/smf/index.php?topic=5209.0

[fleurbleue]

I look also at http://www.backyardgardener.com/tm.html for various genus 

[John85]

Thank you all.Ontario Rock Garden site is indeed very easy to use.Unfortunately still several species with no information.So I'll sow and hope and...pray .