Ex situ collections:
| Botanical name | Common name | Variety name / Accession name | Accession number | Part of the MLS |
|---|---|---|---|---|
| Rhododendron | Rhododendron | Piepmatz | 210862.7 | - |
| Rhododendron | Rhododendron | Peep-Bo | 201127 | - |
| Rhododendron | Rhododendron | Sorpe | 201128 | - |
| Rhododendron | Rhododendron | Polaris | 201129 | - |
| Rhododendron | Rhododendron | Hot Shot Variegated | 201131 | - |
| Rhododendron | Rhododendron | Hardijzer Beauty | 201132 | - |
| Rhododendron | Rhododendron | Chinook | 201133 | - |
| Rhododendron | Rhododendron | Boudoir | 201134 | - |
| Rhododendron | Rhododendron | Blush | 201135 | - |
| Rhododendron | Rhododendron | Silvester | 201147 | - |