GENERAL & FORUMS
ArboristSite (forum)
Dave’s Garden (forum)
FlowersForums
LawnSite (forum)
The Internet’s Gardening Community
TreeHouse (forum)
UBC Botanical Forums
BOTANICAL GARDENS
Royal Botanic Gardens, Kew
Arnold Arboretum
BOTANICAL SITES (MADLY COMPREHENSIVE)
Botany.com
bug ID
CalPhotos
eFloras.org
FloriData
Florida Plants Online
HortNet
ID It
ID woody plants
INDEX Waynes Word
Perry’s Perennial Pages
PLANTS National Database
Plants Images DB
Rock Gardens
Wayne’s Word
UCONN Plant Database
CACTI & SUCCULENTS
Drought Smart Plants
Australian Cactus site
Bob Smoley Gardenworld
Cacti.com
CactusMall
Desert Tropicals
Epidendrums, reedstem
EpiForums
Gasterias
Haworthia
Mountain Crest Gardens
Sempervivums
Sempervivum index
Squaw Mountain Gardens
San Diego Epiphyllum Society
Sempervivum page
Succulents/Belgium
Succulent Euphorbias
MISCELLANEOUS DATABASES
daylily database
pesticide info
PLANT & SEED SOURCES
Arrowhead Alpines
Avant Gardens
Gardens North
GardenWeb seed exchange
lilacs from Canada
Mountain Crest Gardens
Plant Zoo
Squaw Mountain Gardens
Thompson & Morgan
Spalding Bulb
PLANT MATERIALS (sites)
TROPICALS
Raphis Gardens
Stokes Tropicals
TREES & SHRUBS
ALL ABOUT TREES: Collection of Dendrology Resources
Apple Journal
Florida Landscape Plants
lilac info
Ohio tree index
Tough Trees
Tree ID
PERENNIALS
Flower Database
All-Star Groundcovers
Daylily World
EverMay (Primulas)
Fieldstone Perennials
Gentians
geraniums
Mays Acres Daylilies
PRINT (BOOKS & MAGAZINES)
Grieve Herbal Online
Horticulture Magazine
organic info
Rainbow Gardens Bookshop
Timber Press
REFERENCE
animated knots
bug ID
CODIT
construction calculators
green roofs
height of tree calc.
WEED & DISEASE INFO
corn gluten
plant disease diagnostics
Invasives (general)
invasives (New York)
invasives (Vermont)
moss in the lawn
TreeHelp
EVERYTHING ELSE
UVM Plant Soil Science
Organic Volunteers
Sustainable Ag. Info
Wilderness Light Photography
Ultimate Guide to Gardening Resources
A Beginner’s Guide To Gardening -16 Secret Tricks Uncovered