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Professional Plant Group NameAddressCityStateCountryPostal Code
01 National Association of State Departments of Agriculture WashingtonDCUSA 
Alabama Turfgrass AssociationBox 241281MontgomeryALUSA36124
Alaska Horticulture Association AnchorageAKUSA 
Alliance for Historic Landscape Preservation82 Wall StNew YorkNYUSA10005
Allied Landscape Industry1250 I St NW Suite 500WashingtonDCUSA20037
American Association of Amateur Arborists   USA 
American Association of Botanical Gardens & Arboreta351 Longwood RdKennett SquarePAUSA19348
American Association of Field Botanists ChattanoogaTNUSA 
American Association of Pesticide Safety Educators BlacksburgVAUSA 
American Botanical Council   USA 
American Bryological & Lichenological Society  CAUSA 
American Forestry Association1516 P St NWWashingtonDCUSA20013
American Horticulture Therapy Association - North East ChapterBox 423South EastonMAUSA02375
American Landscape Contractors of America   USA 
American Landscape Maintenance Association658 Gates Creek RdBradentonFLUSA 
American Phytopathological Society3340 Pilot Knob RdSt. PaulMNUSA55121-2097
American Public Gardens Association WilmingtonDEUSA 
American Seed Trade Association601 13th St NWWashingtonDCUSA20005
American Society for Horticultural Science AlexandriaVAUSA 
American Society for Plasticulture   USA 
American Society of Agronomy MadisonWIUSA 
American Society of Botanical ArtistsP.O. Box 943Wading RiverNYUSA11792
American Society of Consulting Arborists5130 W 101st CircleWestminsterCOUSA80030
American Society of Golf Course Architects221 N LaSalle StChicagoILUSA60601
American Society of Landscape Architects4401 Connecticut Ave NWWashingtonDCUSA20008-2369
American Society of Landscape Architects - DC Chapter WashingtonDCUSA 
American Society of Landscape Architects Redwood Empire Section San FranciscoCAUSA 
American Society of Plant Biologists15501 Monona DrRockvilleMDUSA20855-2768
American Society of Plant Physiologists - Western Section  CAUSA 
American Society of Plant Taxonomists LaramieWYUSA 
American Sod Producers Association Rolling MeadowsILUSA 
American Spice Trade Association2025 M St, NWWashingtonDCUSA20036
American Willow Growers NetworkRD 1 Box 124ASouth New BerlinNYUSA13843
Apiary Inspectors of America  MIUSA 
Arboricultural AssociationAmpfield HouseHampshireEnglandUK 
Arboriculture Society of Michigan East LansingMIUSA 
Asia & Pacific Seed Association   International 
Asociación Española de Parques y Jardines Públicos   Spain 
Associated Landscape Contractors of Colorado5290 E Yale CircleDenverCOUSA80222
Association for Women in Horticulture   USA 
Association for Women in LandscapingBox 22562SeattleWAUSA98122
Association Green Industries of Northeastern Ohio WoosterOHUSA 
Association Landscape Contractors of America HerndonVAUSA 
Association Landscape Contractors of Massachusetts  MAUSA 
Association Landscape Contractors of Oregon  ORUSA 
Association of American Pesticide Control OfficialsBox 1249HardwickVTUSA05843
Association of American Seed Control Officials   USA 
Association of Consulting Foresters of America312 Montgomery StAlexandriaVAUSA 
Association of Ed & Research Greenhouse Curators ChampagneILUSA 
Association of Liner ProducersOut RawcliffeLancashireEnglandUK 
Association of Natural Biological Control Producers10202 Cowan Heights DrSanta AnaCAUSA92705
Association of Official Seed Certifying Agencies   USA 
Association of Professional Landscape DesignersBox 66803FalmouthMEUSA04105
Association of Specialty Cut Flower Growers OberlinOHUSA 
Association Professional Landscape Designers710 E Ogden Ave Suit 600NapervilleILUSA60563-8603
Atlantic Seaboard Wine AssociationBox PThe PlainsVAUSA22171
Atlantic Seedsmen’s Association298 McCormick AveState CollegePAUSA16801
Australasian Plant Pathology Society   Australia 
Australian Golf Course Superintendents Association   Australia 
Big Island Beekeepers AssociationBox 430PapaikouHIUSA96781
Big Island Dendrobium Growers Association of HawaiiBox 4153HiloHIUSA96720
Botanic Gardens Conservation InternationalRichmondSurreyEnglandUK 
British Agrochemicals AssociationPeterboroughCambridgeshireEnglandUK 
British Association of Landscape IndustriesLandscape House Henry StYorkshireEnglandUKBD21 3DR
British International Golf Greenkeepers AssociationAldwarkYorkshireEnglandUK 
British Orchid Growers AssociationBrandon CrescentKentEnglandUK 
British Society for Plant PathologyHockeringNorfolkEnglandUK 
British Tomato Growers AssociationBarnhamSussexEnglandUK 
California Christmas Tree Growers  CAUSA 
California Fertilizer Association1700 I St Suite 130SacramentoCAUSA95814
California Garden and Landscape History Society3223 East First StLong BeachCAUSA90803
California Landscape Contractors Association2021 N St Suite 300SacramentoCAUSA95814
California Rare Fruit Growers  CAUSA 
California Sod Producers Association  CAUSA 
Canadian Botanical Association   Canada 
Canadian Botanical Conservation NetworkBox 399HamiltonOntarioCanadaL8N 3H8
Canadian Horticulture Therapy Association - GuelphRR 5GuelphOntarioCanadaN1H 6J2
Canadian Horticulture Therapy Association - HamiltonRoyal Botanic GardensHamiltonOntarioCanadaL8N, 3H8
Canadian Organic Growers   Canada 
Canadian Seed Trade Association NepeanOntarioCanada 
Canadian Sphagnum Peat Moss Association   Canada 
Canberra Organic Growers' Society Canberra Australia 
Carolina Grounds Management AssociationBox 220942CharlotteNCUSA28222-0942
Club Managers Association of America1733 King StAlexandriaVAUSA22314
Colorado Association of Lawn Care ProfessionalsBox 4071EnglewoodCOUSA80155-4071
Commercial Horticulture Association   USA 
Commercial Seed Analysts Association of Canada   Canada 
Consulting Arborist Society  EnglandUK 
Coronado Floral Association San DiegoCAUSA 
Council for Agriculture Science & Technology AmesIAUSA 
Council of Landscape Architectural Reg Boards12700 Fair Lakes Circle Suite 110FairfaxVAUSA22033
Council of Tree & Landscape Appraisers1250 I St NW Suite 500WashingtonDCUSA20005
Council on Botanical & Horticulture Libraries   USA 
Crop Science Society of America677 S Segoe RdMadisonWIUSA53711-1086
CropLife America1156 15th St NWWashingtonDCUSA20005
Cultivated Sod Association of New JerseyBox 231New BrunswickNJUSA08903
Ecological Landscaping Association   USA 
European Tissue Culture Society   Europe 
European Weed Research Society   Europe 
Field Botanists of OntarioRR 1ActonOntarioCanadaL7J 2L7
Floral Designers of Sun City15625 Skyhawk DrSun City WestAZUSA85375-6514
Florida Sod Growers Cooperative  FLUSA 
Florida Turfgrass Association5850 TG Lee Blvd #110OrlandoFLUSA32822-4423
Flowers & Plants AssociationLondonMiddlesexEnglandUK 
Georgia Commercial Flower Growers AssociationBox 2945LaGrangeGAUSA30241
Georgia Green Industry AssociationBox 369EpworthGAUSA30541
Georgia Perennial Plant AssociationPOBox 13425AtlantaGAUSA30324-0425
Georgia Turfgrass Association5198 Ross RdAcworthGAUSA30102
Golf Course Builders Association of America920 Airport Rd Suite 210Chapel HillNCUSA27514
Golf Course Superintendents Association of America1421 Research Park DrLawrenceKSUSA66049
Grounds Management Association of Wisconsin221 Eagle DRMiddletonWIUSA53562
Hawaii Agriculture Commodities Service  HIUSA 
Hawaii Beekeepers Association47-814 Ahilama RdKane'oheHIUSA96744
Hawaii Export Nursery AssociationBox 771HiloHIUSA96720
Hawaii Florists & Shippers AssociationBox 5640HiloHIUSA96720
Hawaii Protea AssociationBox 425KulaHIUSA96790
Hawaii State Guava Association1965 Kamehameha AveHiloHIUSA96720
Hawaii Tropical Flowers & Association - Kauai ChapterBox 1067LawaiHIUSA96765
Hawaii Tropical Flowers Association - Hana ChapterBox 596HanaHIUSA96713
Hawaiian Anthurium Industry AssociationBox "H"KurtistownHIUSA96760
Herefordshire Botanical Society HerefordshireEnglandUK 
Horticulture Trades Association  EnglandUK 
Illinois Landscape Contractors Association2200 S Main St Suite 304LombardILUSA60148
Independent Organic Inspector Association   USA 
Intermountain Turf Producers   USA 
International Association of Plant Breeders Fort CollinsCOUSA 
International Herb Association   International 
International Plant Genetic Resources Institute   International 
International Seed Trade Federation   International 
International Society of Arboriculture6 Dunlap CtSavoyILUSA61874
International Society of Arboriculture - Rocky Mountain Chapter6740 E Hampden Ave #306DenverCOUSA80224
International Society of Arboriculture - Western Chapter3610 N 44th St #240PhoenixAZUSA85018
International Society of Arboriculture Australia Chapter   Australia 
International Society of Arboriculture Midwestern Chapter ChampaignILUSA 
Interstate Professional Applicators Association MiltonWAUSA 
Iowa Arborist AssociationIowa State UniversityWaukeeIAUSA 
Iowa Golf Course Superintendents Association AmesIAUSA 
Iowa Professional Lawn Care Association  IAUSA 
Iowa Sports Turf Managers AssociationRR I Box 281AmesIAUSA50010
Iowa Turf Institute  IAUSA 
Irrigation Association   USA 
Israeli Society of Botany  (NA)Israel 
Landscape Contractors Association9053 Shady Grove CtGaithersburgMDUSA20877
Landscape Industry Council of Hawaii1085 S Beretania St Suite 203HonoluluHIUSA96814
Landscape Maintenance Association1025 S Semoran Blvd Ste 1093Winter ParkFLUSA32792-5511
Landscape Ontario Horticultural Trades Association7856 Fifth LnMiltonOntarioCanadaL9T 2X8
Lawn & Garden Dealers AssociationBox 700868TulsaOKUSA74170-0868
Lawn & Garden Marketing & Distribution Association1900 Arch StPhiladelphiaPAUSA19103
Lawn Care Association of Pennsylvania908 N Second StHarrisburgPAUSA17102
Lawn Equipment Dealers AssociationBox 38Sierra MadreCAUSA91025
Lawn Services Association of Michigan New BaltimoreMIUSA 
Long Island Arboricultural AssociationBox 565FarmingdaleNYUSA11735
Los Angeles Arboretum Foundation301 N Baldwin AveArcadiaCAUSA91007-2697
Louisiana Arborist Association917 Beckenham DrBaton RougeLAUSA70808
Louisiana-Mississippi Christmas Tree Association  LAUSA 
Maine Arborists Association5 Tenney LnScarboroughMEUSA04074
Maine Beekeepers AssociationRR 2 Box 26BathMEUSA04538
Maine Organic Farmers and Gardeners Association  MEUSA 
Maine Pomological Society104 Black RdFairfieldMEUSA04937
Maine State Florists' and Growers' Association35 Howard StBoothbay HarborMEUSA04538
Maryland Seeding Association120 N Carolina AvePasadenaMDUSA21122
Massachusetts Arborist Association  MAUSA 
Massachusetts Association of Lawn Care Professionals  MAUSA 
Maui Flower Growers AssociationBox 495HanaHIUSA96713
Maui Produce Processing CooperativeRR 1, Box 610KulaHIUSA96790
Metro Atlanta Landscape & Turf Association5198 Ross RdAcworthGAUSA30102
Metropolitan Detroit Landscape Association30700 Telegraph Rd Suite 4555Bingham FarmsMIUSA48025
Michigan Apples  MIUSA 
Michigan Blueberry Growers Association  MIUSA 
Michigan Grape & Wine Industry Council  MIUSA 
Michigan Turfgrass Foundation East LansingMIUSA 
Mid Atlantic Field Manager’s Organization  MDUSA 
Mid Maine Greenhouse Growers2106 Essex StBangorMEUSA04401
Minnesota Professional Lawn Care Association  MNUSA 
Minnesota Society of Arboriculture MinneapolisMNUSA 
Montana Turf & Ornamental Professionals  MTUSA 
Nassau/Suffolk Landscape Gardeners Association BrightwatersNYUSA 
National Arborist Association3 PerimeterRdManchesterNHUSA03103
National Association for Olmsted Parks  MDUSA 
National Association of State Foresters WashingtonDCUSA 
National Christmas Tree Association611 E Wells StMilwaukeeWIUSA53202
National Golf Course Owners Association1470 Ben Sawyer BlvdMount PleasantSCUSA29464
National Golf Foundation1150 S US Hwy One Suite 401JupiterFLUSA33477
National Landscape Association1000 Vermont Ave. N. W.WashingtonDCUSA20005-4914
National Pest Control Association8100 Oak StDunn LoringVAUSA22027
National Turfgrass Evaluation Program   USA 
Nebraska Professional Lawn Care Association  NEUSA 
Nebraska Sod Producers Association LincolnNEUSA 
Nevada Landscape AssociationBox 7431RenoNVUSA89510
New Hampshire Golf Association  NHUSA 
New Jersey Turfgrass AssociationBox 340MilltownNJUSA08850-0340
New York Flora AssociationNew York State MuseumAlbanyNYUSA12230
New York State Lawn Care AssociationBox 6ChurchvilleNYUSA14428
New York State Turfgrass AssociationBox 612LathamNYUSA12110
North American Botanical Conservatories   International 
North American Horticultural Supply Association   USA 
North Carolina Christmas Tree Association  NCUSA 
North Carolina Landscape Contractors AssociationBox 400KnightdaleNCUSA27545
Northern Nut Growers Association9870 S Palmer RdNew CarlisleOHUSA45344
Nova Scotia Organic Growers Association Annapolis RoyalNova ScotiaCanada 
Ohio Chapter of the International Society of Arboriculture ColumbusOHUSA 
Ohio Florists' Association  OHUSA 
Ohio Landscapers Association RichfieldOHUSA 
Ohio Lawn Care Association1100 H Brandywine BlvdZanesvilleOHUSA43702
Ohio Pesticide Applicators for Responsible Regulation1300 Terminal TowerClevelandOHUSA44113
Oklahoma Turfgrass Research Foundation  OKUSA 
Ontario Turfgrass Research FoundationUniversity of GuelphGuelphOntarioCanada 
Organic Crop Improvement Association1001 Y St, Suite BLincolnNEUSA68508-1172
Organization of Biological Field Stations  CAUSA 
Pennsylvania-Delaware Chapter of the International Society of Arboriculture  PAUSA 
Perennial Plant Association3383 Schirtzinger RdHilliardOHUSA43026
Processors & Growers Research OrganisationThornhaughNorthamptonshireEnglandUK 
Professional Grounds Management Society120 Cockeysville Rd Suite 104Hunt ValleyMDUSA21031
Professional Landcare Network   USA 
Professional Lawn Care Association of America1000 Johnson Ferry Rd NE - Suite C-135MariettaGAUSA30068-2112
Professional Lawn Care Association of Ontario204 Bleams RdKitchenerOntarioCanadaN2C 2K6
Professional Pesticides Users of Connecticut88 Palmer DrSouth WindsorCTUSA06074
Professional Plant Growers AssociationBox 27517LansingMIUSA48909
Professional Recyclers Of Pennsylvania BellwoodPAUSA 
Rocky Mountain Regional Turfgrass Association  COUSA 
Rocky Mountain Sod Growers Association  COUSA 
San Francisco Professional Gardeners' Association425 Potrero AveSan FranciscoCAUSA94110
Shropshire Botanical Society ShropshireEnglandUK 
Society for Ecological Restoration1955 W Grand Rd #150TucsonAZUSA85745-1174
Society of American Florists AlexandriaVAUSA 
Society of American Foresters5400 Grosvenor LnBethesdaMDUSA 
Society of Commercial Seed Technologists   USA 
Society of Municipal ArboristsBox 11521St. LouisMOUSA63105
Society of Nematologists LincolnNEUSA 
Sod Growers Association of Michigan50240 Martz RdBellevilleMIUSA48111
Soil & Water Conservation Society7515 NE Ankeny RdAnkenyIAUSA50021-9764
Soil Science Society of America MadisonWIUSA 
South Carolina Landscape & Turfgrass Association  SCUSA 
South Carolina Sod Producers Association  SCUSA 
South Texas Golf Course Superintendents Association  TXUSA 
Southern Garden History Society   USA 
Southwestern Ontario Vintners Association  OntarioCanada 
Sports Turf Managers Association   USA 
SW Michigan Fruit Growers NilesMIUSA 
Texas Association of Landscape Contractors  TXUSA 
Texas Turfgrass Association  TXUSA 
Tissue Culture Association  MDUSA 
Tree Care Industry Association ManchesterNHUSA 
Tropical Fruit Growers Association  HIUSA 
Turfgrass Producers International1855-A Hicks RdRolling MeadowsILUSA60008
Turfgrass Producers of Texas  TXUSA 
United States Golf Association Green Section   USA 
University of Tennessee Arboretum SocietyUniversity of TennesseeKnoxvilleTNUSA 
Utah Nursery and Landscape Association  UTUSA 
Utah State Lawn Care & Pest Control Association  UTUSA 
Vermont Association of Professional Horticulturists  VTUSA 
Washington Association of Landscape Professionals1723 - 100th Place SE Suite CEverettWAUSA98208-3800
Washington State Horticulture Association  WAUSA 
Weed Science Society of America1508 W University AveChampaignILUSA61821-3133
West Hawaii Orchid Growers Association  HIUSA 
Western Canada Turfgrass Association Maple RidgeBritish ColumbiaCanada 
Wisconsin Arborist Association MadisonWIUSA 
Wisconsin Landscape Contractors Association21620 Belgren RdWaukeshaWIUSA53186
Wyoming Groundkeepers and Growers Association  WYUSA 

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