| 1 | | | Isola Madre( Lake Maggiore Italy ) |
| 2 | | | Kalmthout Arboretum (Belgium) |
| 3 | | | Parco Botanico del Gambarogno (formerly managed by Eisenhut) |
| 4 | | | Park der Gärten (Germany) |
| 5 | | | Quinta do Palheiro ( Madeira) |
| 6 | | | Rhododendron Park - Bremen (Germany) |
| 7 | | | Rhododendron Park Hobbie (Germany) |
| 8 | | | Villa Anelli (Lake Maggiore Italy) |
| 9 | | | Villa Taranto (Italy) |
| 10 | | | Wespelaar Arboretum (Belgium) |
