Rhododendron ‘Fantastica’ (‘Mars’ x ‘Koichiro Wada’) – A bicolor rhododendron with prolific trusses of deep rose pink flowers with a white throat and faint green spotting. The dark green tapered leaves have a reverse of white indumentum. ‘Fantastica’ is also an RHS Award of Garden Merit winner and prefers well-drained but evenly moist soils. Grows 4′ high by 5′ wide. Zone 6.
Rhododendron ‘Melrose Flash’ (‘Scintillation’ x [‘Mrs. A.T. de la Mare’ x ‘King of Shrubs’] x ‘Holy Moses’) – Another eye-catching bicolor with ruffled creamy-white flowers edged in pastel pink and accented with a yellow throat. This Oregon introduction generally blooms in late May. The blooms are nicely contrasted by the deep green foliage. Grows 5′ tall by 5-6′ wide. Zone 6.
Rhododendron ‘Holden’ (‘Cunningham’s White’ x red R. catawbiense seedling) – A compact cultivar with symmetrical round trusses of ruffled shell pink blossoms subtly accented with red spotting. This mid spring bloomer has glossy deep green foliage and is named after the Holden arboretum. Prefers morning sun. Grows 3-4′ high and wide. Hardy to zone 5.
Rhododendron ‘Kodiak’ (R. bureavii x ‘Ken Janeck’) – This rhododendron is probably most appreciated as the truss is opening – as the white to pale pink blooms are sharply outlined in hot pink at this time. These are beautifully contrasted by the dark green foliage which has light tan indumentum on the reverse. Tolerates full sun. Grows 4′ high and wide. Hardy to zone 7.
Rhododendron ‘Kalinka’ (‘Morgenrot’ x [‘Mars’ x ‘Koichiro Wada’]) – A yakushimanum hybrid with tight trusses of rose-pink blooms that often smother the entire shrub in mid spring. These also have yellowish-green spots marking the throat. This Hachmann hybrid has deep green foliage accented with brown indumentum on the reverse. Grows 4-5′ high and 5′ wide. Z5.