(thanks Casie Becker). But this link is the one link I have been looking for
They claim over 7700 shops where you can order by mail.
Don't think I'll start accumulating that much in here
If another similar website comes forward, I'll ad it, but for companies, I can imagine you'd first want to check with Daves Garden and only put there link in here if you disagree or if you are missing one.
De Bolster (Nl) They grow for seeds, work 100% organic and are also doing some seeds selection (dunno on the good English term).
Bingenheimer Saatgut AG The most pushing company for Bio dynamicly selected seeds for the market garden in Western Europe. They also have some seeds that are 'only' organic.
I get seed catalogs also from Territorial Seed Company and Southern Exposure Seed Exchange, which I find interesting and occasionally something new and exciting. As for tree species (ARGHHH!!!) Here is a food plant desert. Nothing much local. I'll be experimenting with growing from seed this year. Others say they've had luck with that and that does increase genetic diversity. I've also gotten stuff from eburgess.com (but I warn you only order in late winter for spring because they will ship almost any time no mater how unfavorable for the plants, except if the ground is frozen). And, I just don't think middle of August is the right time to ship live plant materials in a plastic bag. I got my seed from Sheffield's and the grocery store. Sheffield's shipped fast and has a growing guide, so we'll see how that all works out. I'm hoping I get enough success to give away.
There's another forum, Dave's Garden, which has the largest database of mail order and online nurseries, with reviews that I've found. If you know what plants you want, do a search to find them in the plant files and there will be a link on that page to vendors who carry (or at least sometimes carry) that plant variety.
It's not an organic forum, much less a permaculture site, but there are areas where they really excel. Vetting the quality of plant merchants is one.