Oh oops! I also forgot to ask if those websites/magazines also contain a section for selling already grown plants.

GC, I've included the links to some of my favorite heritage seed suppliers in Canada with decent prices and have been reputable for me. I don't think any of them carry starter plants. I do order a few starter plants from T&T Seeds in Manitoba. Not sure if they have vegies though. :)
Hope this helps. I'm sure many of my fellow GWers will chime in with many more ideas. :)

Ginny Garden

http://www.ttseeds.com/PHP/home.php

http://www.saltspringseeds.com/

http://www.heritageharvestseed.com/

http://www.terraedibles.ca/

http://cottagegardener.com/

http://www.prseeds.ca/catalogue/grain.php?C=Grain

http://www.damseeds.ca/productcart/pc/home.asp

Thanks so much! I will check them out right now.

There are several:
eagleridgeseeds.com
seedsandmore.com
gardensnorth.com
hopeseeds.com
tatianastomatoes.com

Those are some I can remember.
Caroline

One of my favourites:

www.hawthornfarm.ca

certified organic with a good selection of flower seeds.

Here is a link that might be useful: Hawthorn Farm Organic Seeds

Thank you for all the suggestions! I've ordered a few catalogues already. I'm so excited.

I just checked out Hawthorn Farm, when I saw it had organic veg. seeds. Good selection of veggies as well as some organic flowers. Thanks for the recommendation, Bev.

Try mcfayden.com. They have heirloom and organic seed. Also sell seed starting supplies, hardgoods and nursery product. I have been ordering from them for years and have always been pleased with their quality.

Here is a link that might be useful: McFayden mail order

Don't forget Florabunda-- for people interested in heirloom and obscure flower varieties: http://www.florabundaseeds.com/

Also, for herbs, Richters. http://www.richters.com or, for people out West, Sage Garden Herbs http://www.herbs.mb.ca/

Thank you!

Annapolis Valley Heritage Seeds in Nova Scotia offers of nice collection of open pollinated varieties, mostly vegetables. They are small, but growing.

Veseys in Charlottetown, PEI has a large catalogue and sells bulbs, perennials, shrubs, berries, etc. in addition to vegetable and flower seeds. They are definitely not organic overall, but they do offer quite a few certified organic and heirloom seeds. Currently, their spring Veseys Bulbs catalogue, which includes, perennials, roses, fruit trees, as well as bulbs, is offering $35 off a purchase of $75 or more from that catalogue. The offer is good until March 14.

The Canadian gardening newsletter contains a section on Canadian seed catalogues. I haven't looked at them but have included the link below.

Here is a link that might be useful: seed catalogues

I bought from incredibleseeds.ca in Nova Scotia as well.