| Utah Pumpkin Growers | UtahPumpkinGrowers.com |
| Cornell Plant Pathology | VegetableMdOnline.com |
| Big Pumpkins | BigPumpkins.com |
| Circleville Pumpkin Show | PumpkinShow.com |
| Southern Ohio Giant Pumpkin Growers | Sogpg.com |
| The Extreme Pumpkin Store | ExtremePumpkinStore.com |
| Howard Dill | HowardDill.com |
| Giant Pumpkin | GiantPumpkin.com |
| Gus "Squashcarver" Smithhisler | SquashCarver.com |
| Pt. Elgin Pumpkinfest | PumpkinFest.org |
| Reforest Technologies International | Reforest.com (mycorrhizae) |
| Great Pumpkin Commonwealth | GreatPumpkinCommonwealth.com |
| PA Giant Pumpkin Growers Association | Pgpga.com (pumpkin lifters) |
| Long Gourd Growers | LongGourd-Growers.com |
| OVGPG Shirts & Jackets | ZeiglersTrophies@sbcglobal.net |
| Atlantic Giant Genetics Cooperative | Aggc.org |
| European Giant Vegetable Grower's Association | freewebs.com/egvga/ |
| Giant Vegetable Growers of Ontario | Gvgo.ca |
| Pacific Giant Vegetable Growers | Pgvg.org |
| New Breman Giant Pumpkin Growers | GrowGiants.com |
| Western Laboratories | WesternLaboratories.com |
| Maine Pumpkin Growers Organization | MainePumpkins.com |
| Indiana Pumpkin Growers Association | Ipga.us |
| Neptune's Harvest Fertilizer | NeptunesHarvest.com |
| Connecticut Giant Pumpkin & Squash Growers Association | CTpumpkin.com (disease reports) |
| Columbus Irrigation | ColumbusIrrigation.com |
| Colorado Pumpkins | ColoradoPumpkins.com |
| Giant Watermelons | GiantWatermelons.com |
| Back Yard Giants | BackYardGiants.com (book) |
| New Hampshire Giant Pumpkin Growers Association | Nhgpga.org |
| Canfield Fair | CanfieldFair.com |
| Barnesville Pumpkin Festival | BarnesvillePumpkinFestival.com |
| Giant Watermelon Growers | GiatWatermelonGrowers.com |