Shrub Rhododendron × 'Aglo' (P.J.M. Hybrid Group) [Aglo Rhododendron] 'Aglo' is a compact grower and early bloomer. One of the most cold tolerant flower buds of the evergreen rhododendrons. 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 catawbiense [Catawba Rhododendron] The Catawba Rhododendron is considered to be one of the hardiest rhododendron species. Beautiful plant when it is used in mass. Flower color of the species does not combine well with some other flower colors. Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of its range. Both flowers and foliage are of equal value in the landscape. Cultivars are usually less hardy than species.…
Shrub Rhododendron catawbiense 'Chionoides' [Chionoides Rhododendron] White flowers have the yellow centers and make numerous dome shaped trusses. The broad, dense plant is easy to grow and has attractive, narrow foliage.
Shrub Rhododendron catawbiense 'Lee’s Dark Purple' [Lee's Dark Purple Catawba Rhododendron] The compact, but wide and bushy 'Lee's Dark Purple' is common in commerce. Avoid harsh, dry, windswept sites. Subject to winter burning of foliage in exposed sites near the limits of its range. Withstands -20 degrees Fahrenheit. Flower color bleaches out in high pH. Interveinal chlorosis can also occur in high pH soils. Sulfur can be added to increase the acidity of the soil, but this is not a permanent solution to these problems. Susceptible…
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.
