| Association of Professional Landscape Designers, Connecticut Chapter | apldct.org |
| Audubon Connecticut | ct.audubon.org |
| Aton Forest, Inc. | atonforesthome.blogspot.com |
| Connecticut Association of Wetland Scientists | ctwetlands.org |
| Connecticut Botanical Society | ct-botanical-society.org |
| Connecticut Chapter of the American Society of Landscape Architects | ctasla.org |
| Connecticut Conservation Districts: | |
| -Eastern | www.conservect.org/eastern |
| -North Central | http://conservect.org/Default.aspx?alias=conservect.org/northcentral |
| -Northwest | http://www.nwcd.org |
| -Southwest | http://conservect.org/Default.aspx?alias=conservect.org/southwest |
| Connecticut College Arboretum | http://www.conncoll.edu/the-arboretum/ |
| Connecticut Department of Energy and Environmental Protection | http://www.ct.gov/deep |
| Connecticut Envirothon | http://www.ctenvirothon.org |
| Connecticut Forest & Park Association | http://www.ctwoodlands.org/ |
| Connecticut Gardener | conngardener.com |
| Connecticut Greenhouse Growers Association | |
| Connecticut Grounds Keepers Association | http://www.cgka.org/ |
| Connecticut Horticultural Society | http://cthort.org |
| Connecticut Invasive Plant Working Group | http://cipwg.uconn.edu |
| Connecticut Land Conservation Council | http://www.ctconservation.org/ |
| Connecticut Master Gardener Association | ctmga.org |
| Connecticut Nursery and Landscape Association | http://cnla.biz/ |
| Connecticut Resource Conservation and Development Area, Inc. | www.ctrcd.org |
| Connecticut Science Supervisors Association | http://www.cssaonline.org/ |
| Experiment Station Associates | http://agstationfriends.org |
| Federated Garden Clubs of Connecticut, Inc | http://www.ctgardenclubs.org/ |
| Flanders Nature Center | flandersnaturecenter.org |
| Friends of Goodwin Forest | http://www.friendsofgoodwinforest.org/ |
| Lyman Hall High School’s Agricultural Science and Technology Program | |
| Mad Gardeners, Inc. | www.madgardeners.org |
| Naugatuck Valley Community College, Horticulture Program | www.nv.edu/Credit/Horticulture |
| Northeast Organic Farming Association: Organic Land Care Program | http://www.organiclandcare.net |
| Pomperaug River Watershed Coalition | http://www.pomperaug.org/ |
| Quinnipiac River Watershed Association | https://www.qrwa.org/ |
| The Connecticut Agricultural Experiment Station | http://www.ct.gov/CAES |
| The Nature Conservancy | http://www.nature.org/ |
| UConn | |
| College of Agriculture, Health and Natural Resources | http://canr.uconn.edu |
| – Department of Extension | http://www.extension.uconn.edu/ |
| – UConn Extension Master Gardener Program | http://mastergardener.uconn.edu |
| – Department of Natural Resources and the Environment | http://www.nrme.uconn.edu/ |
| – Department of Plant Science and Landscape Architecture | http://plantscience.uconn.edu |
| – Home & Garden Education Center | http://ladybug.uconn.edu |
| Department of Ecology and Evolutionary Biology | http://eeb.uconn.edu |
| USDA APHIS | https://www.aphis.usda.gov/aphis/ourfocus/planthealth |
| USDA Natural Resources Conservation Service | http://www.nrcs.usda.gov/wps/portal/nrcs/site/national/home/ |
| Wallingford Conservation Commission | http://www.town.wallingford.ct.us/Content/Conservation_Commission.asp |
| Weir Farm National Historic Site | https://www.nps.gov/wefa |
| White Memorial Conservation Center | https://www.whitememorialcc.org/ |
| Wild Ones Native Plants, Natural Landscapes | http://www.wildones.org/connect/chapters/connecticut-chapters/ |
| Yale School of Forestry and Environmental Studies | http://environment.yale.edu/ |