Shrub Rhododendron catawbiense 'Mrs. C.S. Sargent' [Mrs. C.S. Sargent Catawba Rhododendron] Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of its range, however, this is a good cultivar for cold areas. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron catawbiense 'Pearce’s American Beauty' [Pearce's American Beauty Catawba Rhododendron] Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of its range. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron catawbiense 'Roseum Elegans' [Roseum Elegans Catawba Rhododendron] A reliable bloomer that is common in commerce. Flower color does not always combine well with some other flower colors. Flower color bleaches out in high pH. Can be subject to winter burning of foliage in exposed sites near the limits of its range, but this cultivar can tolerate extreme heat and extreme cold (to -25 degrees Fahrenheit). Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural…
Shrub Rhododendron × 'Elite' (P.J.M. Hybrid Group) [Elite Rhododendron] 'Elite' is a large, vigorous rhododendron and one of the earliest P.J.M. cultivars to bloom. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking lavender soon after opening. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Hino-red' (Kurume Hybrid Group) [Hino-red Azalea] 'Hino-red' is a hardy, compact, evergreen azalea that produces bright red flowers in early spring. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Holden' (Shammarello Hybrid Group) [Holden Rhododendron] Compact plant with a long bloom season. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron maximum 'Roseum' [Roseum Rosebay Rhododendron] 'Roseum' requires wind and shade protection, although it is a vigorous grower. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Northern Starburst' (P.J.M. Hybrid Group) [Northern Starburst Rhododendron] One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking mauve-lavender soon after opening. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Olga Mezitt' (P.J.M. Hybrid Group) [Olga Mezitt Rhododendron] 'Olga Mezitt' is a vigorous rhododendron with pink flowers. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become dirty looking soon after opening. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'P.J.M.' (P.J.M. Hybrid Group) [P.J.M. Rhododendron] One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking lavender soon after opening. Quite variable in form and flower color. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
