| Rating | Plant | Thumbnail |
| Deciduous Azalea 'Admiral Semmes'
Rhododendron | |
| Rhododendron 'Aglo'
Rhododendron |  |
| Southern Azalea 'alba'
Rhododendron indica |  |
| Rhododendron 'Album'
Rhododendron dauricum |  |
 | Catawba Rhododendron 'Album'
Rhododendron catawbiense
Hybridized by A. Waterer
Additional info: (White) |  |
| Japanese Azalea, Kyushu Azalea 'Album'
Rhododendron kiusianum |  |
| Vireya Rhododendron 'Aleksandr Isayevitch'
Rhododendron |  |
| Elepidote Rhododendron 'Alena'
Rhododendron | |
| Rhododendron 'Alfreda Wiaczek'
Rhododendron
Hybridized by Dave Lewis
Additional info: (aka Pale Face) | |
| Rhododendron 'Alice Eastwood'
Rhododendron | |
| Rhododendron 'Alice Street'
Rhododendron |  |
| Rhododendron 'Alice Swift'
Rhododendron
Hybridized by Yavorsky | |
| | Vireya Rhododendron 'Alisa Nicole'
Rhododendron |  |
| Deciduous Azalea, Exbury Azalea 'Aloha'
Rhododendron | |
| Rhododendron 'Amaghasa'
Rhododendron | |
| Rhododendron 'Amber Lantern'
Rhododendron
Hybridized by Arsen | |
| Rhododendron 'Amber Mist'
Rhododendron
Hybridized by Blough
Additional info: (aka Ada Lohr) | |
| Azalea, Rhododendron 'Amelia Rose'
Rhododendron | |
| Rhododendron, Azalea 'America'
Rhododendron
Hybridized by M. Koster & Sons, 1920 |  |
| Rhododendron 'Amigo'
Rhododendron
Hybridized by Goheen, 1974 |  |
| Rhododendron 'Anah Kruschke'
Rhododendron
Hybridized by Kruschke, 1973 |  |
| Rhododendron 'Angel Powder'
Rhododendron |  |
| Rhododendron 'Anita Gehnrich'
Rhododendron | |
| Rhododendron 'Anna Baldsiefen'
Rhododendron
Hybridized by Marietta O'Byrne |  |
| Rhododendron 'Anna Rose Whitney'
Rhododendron |  |
| Azalea 'Antilope'
Rhododendron |  |
| Robin Hill Azalea, Double Flowered Azalea 'Antoine'
Rhododendron
Hybridized by Robert Derby Gartrell | |
| | Azalea 'Aphrodite'
Rhododendron
Hybridized by Glenn Dale |  |
 | Azalea 'Apple Blossom'
Rhododendron |  |
| Azalea 'Apricot Fantasy'
Rhododendron | |
| Azalea 'Apricot Surprise'
Rhododendron
Hybridized by University of Minnesota, 1987
Additional info: (Northern Lights series) |  |
| Rhododendron 'April Dawn'
Rhododendron |  |
| Azalea 'April Gem'
Rhododendron |  |
| Rhododendron 'April Mist'
Rhododendron
Hybridized by Mehlquist |  |
| | Rhododendron 'April Snow'
Rhododendron
Hybridized by Weston Nurseries |  |
| Rhododendron 'April Song'
Rhododendron |  |
| Rhododendron 'April White'
Rhododendron
Additional info: (aka Mehlquist) | |
| Rhododendron 'Arctic Glow'
Rhododendron
Hybridized by Dave Lewis | |
| Rhododendron 'Arctic Pearl'
Rhododendron | |
| Deciduous Azalea, Exbury Azalea 'Arneson Flame'
Rhododendron | |
