I forgot to mention Tom Clothier's site. It's more like an encyclopedia than a forum where people can ask, answer and chat. Lots of info about germination techniques.
http://tomclothier.hort.net/in...
Here are some random, special interest links I've saved up, many specialized to the PNW or WA state. For your state or region, check my signature block for the link to "NIFA County Coop Extension Finder". Check out some of the local links visible as you drill down to your county Extension office. Some of the side links you see as you drill down may be more useful to you than the final organization you find.
Expanded, rotary-kiln fired clay, shale & slate (Haydite, Turface, TurfMatirx ESCSI)
http://www.escsi.org/ContentPa...
the Pacific Bulb Society discussion list
(
http://www.pacificbulbsociety....)
http://www.nwcb.wa.gov/educati...
WSU Master Gardener: NW Native Plant Guide - Growing from Seed
http://gardening.wsu.edu/text/...
WSU COOP Ext Native Plant database: Identifying, propagating & Lanscaping
http://cahedb.wsu.edu/nativePl...
WSU "Gardening in Western Washington"
http://gardening.wsu.edu/
online forums WSU - gardening WA
http://webx.cahe.wsu.edu/
http://webx.cahe.wsu.edu/
[email protected]@.ee79d30
WSU ExtensionMaster Gardener Program
http://mastergardener.wsu.edu/
http://snomgf.org/default.aspx
http://snomgf.org/Links.aspx
The Snohomish County Community Horticulture and Master Gardener Programs help local gardeners
http://snohomish.wsu.edu/CommH...
SnoHo MG newsletter:
http://snohomish.wsu.edu/newsl...
http://theseedsite.co.uk/harve...
http://theseedsite.co.uk/db.ht... (seeds, seedpods & seedlings)