Garden Club Federation of Massachusetts    www.gcfm.org

National Garden Clubs, Northeast Region    www.ngcner.org

National Garden Clubs    www.gardenclub.org

New England Wildflower Society and Garden in the Woods    www.newenglandwild.org

Grow Native Massachusetts    www.grownativemass.org   

North East Botanical Club    www.rhodora.org

University of Massachusetts Information    www.umassgreeninfo.org

Massachusetts Master Gardener Information Resource    www.massmastergardeners.org

Tower Hill Botanic Garden    www.towerhillbg.org

Arnold Arboretum    www.arboretum.harvard.edu