| Name | Town/City | Postal Code |
| G & H Wiley Ltd. | St. Catharines | L2R 6P7 |
| Gaal's Garden | Newmarket | L3Y 1L4 |
| Gallery on the Farm | Hampton | L0B 1J0 |
| Geissberger Farmhouse Cider | Hampton | L0B 1J0 |
| Giffen's Country Market | Glen Huron | L0M 1L0 |
| Giovanna & Rosie Piazza | Milton | |
| Glen Allan | Clearview | |
| Glens of Antrim Farms | Hampton | L0B 1J0 |
| Gourment Meats Ltd. | Mount Hope | L0R 1W0 |
| Green Mountain | Stoney Creek | |
| Greenbelt Farms | Toronto | M6H 3Z2 |
| Greenbelt Services | Orono | L0B 1M0 |
| Greenfields Organic Farm | Duntroon | L0P 1B0 |
| Greenlane Farms | Vineland Station | L0R 2E0 |
| Greer Farms | Mansfield | L0N 1M0 |
| Greg's Fruits & Vegetables | Lincoln | L0R 1B7 |
| Grimo Nut Nursery | Niagara-on-the-Lake | L0S 1J0 |
| Grindstone Creek Nursery Inc. | Millgrove | L0R 1V0 |
| Gryphon Ridge Highlands | Niagara-on-the-Lake | L0S 1J0 |
| Gwennol Farm | Pelham | L0S 1M0 |
| Gwillimdale Farms Ltd. | Bradford-West Gwillimbury | L3Z 2A5 |
