Rhododendron ‘Goldkrone’ (syn. ‘Gold Crown’) ([R. wardii x ‘Alice Street’] x ‘Hachmann’s Marina’) – A Hachmann’s hybrid with tight trusses of 16-18 blooms. The individual flowers are a pale yellow (some say yellowish-green) with light red spotting. This RHS Award of Garden Merit winner prefers a partial sun exposure. Grows 3′ tall by 4′ wide. Hardy to zone 6.
Rhododendron ‘Seaview Sunset’ (‘Nancy Evans’ x ‘Canadian Sunset’) – A spectacular hybrid with bicolor blooms of pale yellow flowers edged in reddish-orange, held in showy dome-shaped trusses. These contrast very nicely against the slightly glossy dark green foliage. This compact rhododendron was bred by Frank Fujioka. Grows 3′ high and wide. Hardy to zone 7.
Rhododendron ‘Sapporo’ (‘Hachmann’s Diadem’ x ‘Hyperion’) – A good choice for those of you who love those dark contrasting blotches of ‘Sappho’ and ‘Calsap’. It features wavy 2″ wide blooms (opening a pale purplish-pink) with a striking burgundy blotch. These are held in rounded trusses of 8-10 flowers. Open growth habit. Grows 5′ tall by 6′ wide. Hardy to zone 5.
Rhododendron ‘Medusa’ (R. scyphocalyx x R. griersonianum) – A true orange among Rhododendrons with pendant salmon-orange blooms that cover the contour of mature specimens. It will occasionally re-bloom later in the season but only with a handful of flowers. This 1928 introduction has rounded grey-green leaves with light indumentum. Grows 3′ tall and wide. Zone 7.
Rhododendron ‘Percy Wiseman’ (R. yakushimanum x ‘Fabia Thompson’) – Another RHS Award of Garden Merit winner with small (but abundant) trusses of creamy-white to pale yellow blooms with a pink blush. These emerge from deep pink buds and contrast nicely against the narrow dark green foliage, Prefers partial sun. Grows 3-4′ high and wide. Hardy to zone 6.