| 0 | 53119 | 12E0100004 | 'Bohumil Kavka' | Rhododendron hybr. | Czechoslovakia | | 6 | 12E0100004 ** |
| 1 | 53120 | 12E0100005 | 'Dagmar' | Rhododendron decorum Franch. | Czechoslovakia | | 6 | 12E0100005 ** |
| 2 | 53124 | 12E0100009 | 'Hurvinek' | Rhododendron dichroanthum Diels subsp. scyphocalyx (Balf. f. & Forrest) Cowan | Czechoslovakia | | 6 | 12E0100009 ** |
| 3 | 53131 | 12E0100016 | 'Motyl' | Rhododendron decorum Franch. | Czechoslovakia | | 6 | 12E0100016 ** |
| 4 | 53139 | 12E0100024 | 'Arnost Silva Tarouca' | Rhododendron decorum Franch. | Czechoslovakia | | 6 | 12E0100024 ** |
| 5 | 53153 | 12E0100038 | 'Catawbiense Grandiflorum' | Rhododendron catawbiense Michx. | United Kingdom | | 6 | 12E0100038 ** |
| 6 | 53178 | 12E0100063 | 'Lady Clermont' | Rhododendron catawbiense Michx. | United Kingdom | | 6 | 12E0100063 ** |
| 7 | 53231 | 12E0100116 | 'Delta' | Rhododendron hybr. | Germany | | 6 | 12E0100116 ** |
| 8 | 53236 | 12E0100121 | 'Dora Weissbach' | Rhododendron hybr. | unknown | | 6 | 12E0100121 ** |
| 9 | 53253 | 12E0100138 | 'Sir Charles Butler' | Rhododendron fortunei Lindl. subsp. fortunei | unknown | | 6 | 12E0100138 ** |
| 10 | 53295 | 12E0100180 | 'Marie Fortie' | Rhododendron hybr. | Belgium | | 6 | 12E0100180 ** |
| 11 | 53313 | 12E0100198 | 'Kantilene' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 6 | 12E0100198 ** |
| 12 | 53336 | 12E0100221 | 'Renata' | Rhododendron hybr. | Germany | | 6 | 12E0100221 ** |
| 13 | 53354 | 12E0100239 | 'Blueshine Girl' | Rhododendron wardii W. W. Sm. | Germany | | 6 | 12E0100239 ** |
| 14 | 53360 | 12E0100245 | 'Volker' | Rhododendron hybr. | Germany | | 6 | 12E0100245 ** |
| 15 | 53368 | 12E0100253 | 'Julischka' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 6 | 12E0100253 ** |
| 16 | 53386 | 12E0100271 | 'Rendezvous' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | Germany | | 6 | 12E0100271 ** |
| 17 | 53390 | 12E0100275 | 'Seestadt Bremerhaven' | Rhododendron insigne Hemsl. & E. H. Wilson | Germany | | 6 | 12E0100275 ** |
| 18 | 53397 | 12E0100282 | 'Admiral Vanessa' | Rhododendron fortunei Lindl. subsp. discolor (Franch.) D. F. Chamb. | Germany | | 6 | 12E0100282 ** |
| 19 | 53453 | 12E0100338 | 'Odessa' | Rhododendron smirnowii Trautv. | unknown | | 6 | 12E0100338 ** |
| 20 | 53456 | 12E0100341 | 'Berliner Liebe' | Rhododendron insigne Hemsl. & E. H. Wilson | Germany | | 6 | 12E0100341 ** |
| 21 | 53480 | 12E0100365 | 'Eruption' | Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara var. yakushimanum (Nakai) Kitam. | unknown | | 6 | 12E0100365 ** |
| 22 | 53552 | 12E0100437 | 'Mrs John Penn' | Rhododendron hybr. | United Kingdom | | 6 | 12E0100437 ** |
| 23 | 53672 | 12E0100558 | 'Silvester' | Rhododendron hybr. | Netherlands | | 6 | 12E0100558 ** |
| 24 | 53746 | 12E0100850 | 'Fuellhorn' | Rhododendron hybr. | Germany | | 6 | 12E0100850 ** |
| 25 | 64798 | 12E0100880 | 'Kotnov' | Rhododendron hybr. | Czech Republic | | 6 | 12E0100880 ** |