Total number of azaleas: [56]
| Cultivar | Group | Ref | Type | Color | Bloom Time | |
|---|---|---|---|---|---|---|
| ‘U.N.R.R.A.’ | Mollis | Galle85 | dec | |||
| U10-8 | Gartrell | Gears04 | evg | |||
| U17-08A | Gartrell | Vines90 | evg | |||
| ‘Uchu-no-hikari’ | Satsuki | Galle85 | evg | |||
| ‘Uchu-no-tsuki’ | Satsuki | SatDict97 | evg | |||
| ‘Uchunishiki’ | Satsuki | SatDict97 | evg | |||
| ‘Uelfe’ | Arendsii | Galle85 | evg | |||
| ‘Ugigomo-no-tsuki’ | Satsuki | Galle85 | evg | |||
| ‘Uji-no-tsuki’ | Satsuki | SatDict97 | evg | |||
|
‘Ukamuse’
('Princess Delight', 'Prince Delight', Wilson #47) |
Kurume/Wilson50 | Galle85 | evg | Pink-Dark | ||
| ‘Ukifunei’ | Satsuki | Greer04 | evg | |||
| ‘Ukigomo-no-tsuki’ | Satsuki | Galle85 | evg | |||
| ‘Ukiguma-no-tsuki’ | Satsuki | Nuccio02 | evg | |||
|
‘Ukigumo-no-Tsuki’
(Moon Over Drifting Clouds) |
Satsuki | evg | |||
|
‘Ukigumo-no-Tsuki #1’
(Ukiguma-no-Tsuki, Moon Over Drifting Clouds) |
Satsuki | evg | ||||
| ‘Ukinishiki’ | Satsuki | Galle85 | evg | |||
| ‘Ukishima’ | Wada | Galle87 | evg | Purple,White | ||
| ‘Ukiyoe’ | Satsuki | SatDict97 | evg | |||
| ‘Ukon’ | Kiusianum | Galle85 | evg | |||
| ‘Umatilla’ | Slonecker | Galle85 | dec | |||
| ‘Ume-no-hikari’ | Satsuki | Galle85 | evg | |||
|
‘Ummu’
(sp?) |
Kurume | Galle85 | evg | |||
| ‘Umpqua’ | Slonecker | Galle85 | dec | |||
| ‘Umpqua Queen’ | KH-Schoneman | Galle85 | dec | |||
| ‘Uncas’ | Sander | Galle85 | evg | |||
| ‘Uncle Salmon’ | Carlson | Galle87 | dec | |||
|
‘Undine’ | Glenn Dale | Galle85 | evg | White | Late Midseason |
|
‘Ungetsu’ | Satsuki | Galle85 | evg | ||
| ‘Ungetsu-no-hana’ | Satsuki | Galle85 | evg | |||
|
‘Ungetsu-no-Hikari’ | Satsuki | Galle85 | evg | Late Midseason | |
| ‘Unique’ | Ghent | Galle85 | dec | |||
| Unnamed florist azalea | Carden-Harris | evg | ||||
| ‘Unpo’ | Satsuki | SatDict97 | evg | |||
| ‘Unryu’ | Satsuki | Galle85 | evg | |||
|
‘Unsurpassable’
('Girard Unsurpassable') |
Girard | Galle87 | evg | Pink-Dark | ||
| ‘Unzen Zakura’ | Kiusianum | Galle85 | evg | |||
| ‘Unzon-tao-tsigi’ | Satsuki | Roslyn94 | evg | |||
| ‘Upright Red’ | Stanton | Galle85 | evg | |||
|
‘Ursula’ | Glenn Dale | Galle85 | evg | Pink | Midseason |
|
‘Usigigyoten’ | Satsuki | evg | |||
| ‘Usshu-no-hikari’ | Satsuki | Galle85 | evg | |||
| ‘Usugesho’ | Satsuki | Galle85 | evg | |||
| ‘Usuginu’ | Satsuki | Galle85 | evg | |||
| ‘Usugukari’ | Kurume | Galle87 | evg | |||
| ‘Usujigyoten’ | Satsuki | SatDict97 | evg | |||
| ‘Usuyo’ | Intergroup | Galle87 | evg | |||
| ‘Usuyukari’ 2 | Kurume | Galle85 | evg | |||
|
‘Usuyukari’ | Kurume | evg | Purple,White | Early | |
|
‘Utage-no-Hana’ | Satsuki | Galle85 | evg | ||
| ‘Utage-no-tsuki’ | Satsuki | SatDict97 | evg | |||
| ‘Utamaro’ | Satsuki | SatDict97 | evg | |||
|
‘Utamaru’
(Utamaro) |
Satsuki | evg | |||
|
‘UTG #1’ | Clark | evg | |||
| ‘Uyo-no-hikari’ | Satsuki | Galle87 | evg | |||
| ‘Uyo-no-tsuki’ | Satsuki | Galle85 | evg | |||
| ‘Uzumagawa’ | Satsuki | SatDict97 | evg | |||
| Cultivar | Group | Ref | Type | Color | Bloom Time |