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| Bundesministerium für Ernährung, Landwirtschaft und Verbraucherschutz |
| Bundessortenamt |
| Gartenbauzentrum Köln-Auweiler |
| Landwirtschaftskammer Niedersachsen |
| Landwirtschaftskammer Nordrhein-Westfalen |
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Landwirtschaftskammer Schleswig-Holstein
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LVG Erfurt
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| LVG Hannover Ahlem |
| LVG Heidelberg |
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All-America Selections |
| American Seed Trade Association |
| Community Plant Variety Office (CPVO) |
| Canadian Ornamental Plant Foundation (COPF) |
| Fleuroselect |
| International Seed Federation (ISF) |
| International Seed Testing Association (ISTA) |
| Landwirtschaftskammer Steiermark |
| National Garden Bureau |
| OFA - The Association of Horticulture Professionals |
| Perennial Plant Association (PPA) |
| USDA United States Department of Agriculture |
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