David C. Royster
(Lee Hybrid Rhododendron, Lee's Dark Purple Rhododendron, Rhododendron)
More than 150 years old and still widely planted, this very cold-hardy Rhododendron catawbiense hybrid bears spherical clusters of plum-violet flowers from mid- to late spring. The wide-flaring, funnel-shaped blooms have brown-flecked upper lobes. This dense, rounded, head-high shrub has large glossy dark-green leaves.
Like most rhododendrons, 'Lee's Dark Purple' favors chilly winters, moderate summers, partial shade, and highly organic, well-drained, acid soil. It departs from the...
A Belgian Indica hybrid, this evergreen azalea bears showy clusters of large bright red blooms. The funnel shaped, scentless flowers appear from early to mid-spring, but may also bloom in late fall and winter in frost-free districts. The upright, waist-high plants have elliptical, dark glossy-green leaves.
Primarily derived from the East Indian species Rhododendron simsii, Rhododendron indicum, and Rhododendron murconatum, Belgian Indica Hybrid azaleas were originally...
(Evergreen Azalea, Lily Marleen Azalea)
Developed from the 1920s to the 1960s by Aart Vuyk of Vuyk van Nes Nursery, Boskoop, Holland, these evergreen azaleas include Kaempferi and Belgian Indica hybrids, 'Mucronatum,' and 'Maxwellii' in their ancestry. They bear clusters of funnel-shaped red, pink, orange, purple, or white flowers on small to medium-sized plants in spring. The funnel-shaped, often ruffled flowers are single or hose-in-hose (with two superimposed sets of petals). The blooms often have contrasting markings on their upper...
(Catawba Rhododendron, Catawba Rosebay, Lord Roberts Rhododendron)
Lord Roberts rhododendron has large, showy clusters (trusses) of broad, open, bell-shaped
flowers of dark red with black markings. This medium-sized, dense, broadleaf evergreen shrub has large, glossy, dark green leaves that can suffer from sun and wind damage if left too exposed in the winter months. Most rhododendron thrive in sites with part shade and moist, acidic, highly organic soil that is perfectly drained. They are susceptible to a wide variety of fungal diseases and insect pests and will...
Combining showy bloom and superior cold hardiness, this Gable Hybird evergreen azalea bears fully double purplish-pink flowers from mid- to late spring on compact domed plants. The camellia-shaped blooms are carried in two- to three-flowered clusters. The small oval leaves are light green.
Developed mostly by Joseph Gable of Stewartstown, Pennsylvania, Gable Hybrids include some of the hardiest evergreen azaleas available, thanks to the contributions of Rhododendron yedoense var....
(Evergreen Azalea, Louisa Azalea)
The hybrid azalea ‘Louisa’ is a prostrate broadleaf evergreen shrub introduced in 1972. It bears clusters of funnel-shaped rosy pink flowers in late spring. The single, unscented flowers have a few red speckles on their upper lobes. This cultivar slowly forms a well-branched, spreading, dense low shrub with small elliptic dark green leaves.
Azaleas prefer partial shade and highly organic, acid soil that is evenly moist but well-drained. Plant them shallowly and mulch well to conserve moisture...
(Evergreen Azalea, Gable Hybrid Azalea, Louise Gable Azalea)
Combining showy bloom and superior cold hardiness, this Gable Hybird evergreen azalea bears large semi-double lavender-pink flowers from mid- to late spring on low wide plants. The broadly funnel-shaped blooms bear purple-rose speckles on their upper lobes. The small elliptic leaves are shiny light green.
Developed mostly by Joseph Gable of Stewartstown, Pennsylvania, Gable Hybrids include some of the hardiest evergreen azaleas available, thanks to the contributions of Rhododendron yedoense...
Introduced in 1849 but still well worth planting for its hardiness, handsome form, and distinctive flowers, this hybrid of Rhododendron catawbiense and R. ponticum bears showy conical clusters of unusual flat star-shaped white flowers in mid-spring. They have a large gold blotch on their upper lobe. This dense, rounded, head-high shrub has large glossy dark-green leaves.
Like most rhododendrons, 'Madame Masson' favors chilly winters, moderate summers, partial shade,...
This Brooks Hybrid azalea bears large long-lasting white blossoms with greenish throats. The semi-double flowers appear from mid- to late spring. In frost-free climates flowering may begin in late fall. This compact rounded cultivar has elliptical leaves that hold their glossy-green color year-round.
The product of crosses between Belgian Indica, Southern Indica, Kurume, and other hybrid azaleas, Brooks Hybrids are heat- and drought-tolerant evergreen azaleas bred in Modesto, California.