Rhododendron x ‘Macrantha Pink’ (Satsuki Hybrid) – A late blooming (May to June) Japanese azalea with 1.75″ single to semi-double funnel-shaped flowers of bright pink over mid green foliage. This cultivar also lightly repeat blooms throughout the summer and makes an excellent informal flowering hedge with pruning. Grows 3-4′ high by 3-5′ wide. Hardy to zone 7.
Rhododendron x ‘Vuyk’s Scarlet’ (Vuyk Hybrid) This RHS Award of Garden Merit winner bears bright crimson funnel-shaped blooms with slightly undulating petal edges. It is a compact, spreading cultivar with oval-shaped glossy green foliage. This Japanese azalea was bred in Holland around 1954. Grows 2 feet high by 2 to 3 feet wide. Hardy to zone 6.
Rhododendron x ‘Gumpo Pink’ (Satsuki Hybrid) – A useful groundcover azalea with a distinct horizontal branching habit. ‘Gumpo Pink’ bears large single light pink blooms (with darker rose flecks in the throat) from mid to late spring over mid green foliage. This Japanese azalea prefers part to full sun. Grows 2′ high by 3′ wide. Hardy to zone 7.
Rhododendron x ‘Purple Triumph’ (Vuyk Hybrid) – This Dutch cultivar was bred in 1951 and features mid purple funnel-shaped blooms (with darker speckling) in May. It is an RHS Award of Garden Merit winner that is reliably evergreen, preferring part to full sun. Requires shelter from cold winter winds and even soil moisture. Grows 2-3′ high and wide. Hardy to zone 7.
Rhododendron x ‘Blaauw’s Pink’ (Kurume Hybrid) – A truly spectacular Japanese azalea with 1.5″ wide bright salmon-pink to coral hose-in-hose blooms, usually in mid May. The flower display literally smothers the evergreen foliage below. ‘Blaauw’s Pink’ is also an RHS Award of Garden Merit winner . Grows 3 to 4 feet high and wide. Hardy to zone 6.