Parent Organization, founded 1913
The Garden Club of America

Arboretums and Gardens
Brooklyn Botanic Garden
Central Park Conservancy
The Cross Estate
Duke Farms
Friends of Frelinghuysen Arboretum
Leonard J. Buck Gardens
Longwood Gardens
Macculloch Hall
New Jersey Botanical Garden - Skylands
New York Botanical Garden
Rutgers Gardens
Willowood Arboretum

Education
Backyard Gardener
Cook College Rutgers University
Gardening Journey
Great Swamp Watershed Association
Greater Newark Conservancy
Home Gardening, Cornell University
Home, Lawn & Garden - Rutgers Cooperative Extension
New Jersey Conservation Foundation
New York Botanical Garden - Education Programs 
Plant Explorer, Longwood Gardens
Rutgers Master Gardener Program
Vegetable Gardening for Beginners: The Complete Guide

Plant Societies
African Violet Society of America
American Conifer Society
American Daffodil Society
American Fern Society
American Gourd Society
American Hermerocallis Society
American Horticultural Society
American Orchid Society 
Azalea Society of America
Bromeliad Society International
Herb Society of America
Ikenobo Ikebana Society of America
Magnolia Society
Native Plant Societies/American Horticultural Society
Native Plant Society of New Jersey
North American Rock Garden Society
The American Hosta Society
The American Hydrangea Society
The Perennial Plant Association

Publications
The American Gardener - American Horticultural Society
Fine Gardening
Garden Design Magazine
Horticulture
NJ Gardener News