David C. Royster
(Evergreen Azalea, Prize Azalea, Whitewater Hybrid Azalea)
A Whitewater Hybrid, this evergreen azalea bears showy clusters of large semi-double rose-red flowers in spring. The mounded chest-high plants have elliptic green leaves.
Developed for greenhouse forcing by Henry Motzkau of the United States, Whitewater azaleas result from crosses involving Belgian Indica Hybrids and other hybrid azaleas. Although developed primarily for container growing, they also do well in the landscape in mild climates.
Whitewater azaleas prefer partial shade and...
(Evergreen Azalea, Glenn Dale Hybrid Azalea, Prudence Azalea)
Bearing showy few-flowered clusters of bright purple-pink flowers from early to mid-spring, 'Prudence' is one of the more than 400 named evergreen azalea hybrids developed from the late 1920s through the 1940s at the United States Department of Agriculture’s Plant Introduction Station at Glenn Dale, Maryland. The funnel-shaped blooms are unscented and unmarked. The spent flowers drop rather than persisting on the plant. This upright, rounded, shoulder-high shrub has small elliptic glossy dark-green...
Mark A. Miller
(Nearing Rhododendron, Purple Gem Rhododendron, Rhododendron)
'Purple Gem' is a low-growing, evergreen rhododendron resulting from a cross between the U.S. native Rhododendron carolinianum and the Asian native Rhododendron fastigiatum. It is indeed a gem, requiring little maintenance and producing a profusion of lavender-blue flowers in mid-spring. The medium-sized leaves are blue-green upon emergence and assume bronze tones in fall. Provide part shade and humus-rich, acid soil. Plant in combination with other rhododendrons, in front of mixed border or as...
(Boskoop Hybrid Rhododendron, Purple Lace Rhododendron, Rhododendron)
A hybrid of 'Purple Splendour' that offers heavily ruffled blooms of a similar deep shade, this Dutch hybrid bears its showy spherical flower clusters from mid-to late-spring. The wide-flaring funnel-shaped flowers lack the prominent black blotch of its parent. This rounded head-high shrub has large, elliptic, glossy dark green leaves whose surface is attractively rippled.
Like most rhododendrons, 'Purple Lace' favors chilly winters, moderate summers, partial shade, and highly organic, well-drained,...
David C. Royster
(Purple Passion Rhododendron, Rhododendron)
Thought to be a chance seedling of 'Purple Splendour', this 1996 introduction offers blooms of a similarly regal hue on a plant that is considerably hardier. Showy spherical clusters of luminous reddish plum-purple flowers appear in late spring. The wide-flaring funnel-shaped flowers have a white blotch on their upper lobes. This rounded head-high shrub has large, elliptic, glossy dark green leaves.
Like most rhododendrons, 'Purple Passion favors chilly winters, moderate summers, partial shade,...
Gerald L. Klingaman
Combining showy bloom and exceptional cold hardiness, 'Purple Splendor' bears bright magenta-purple flowers from mid- to late spring on low spreading plants. The hose-in-hose (two "stacked" whorls of petals), broadly funnel shaped blooms have red spotting on their upper lobes. The small, elliptic, shiny green leaves take on bronze and burgundy tints in fall, and may be deciduous in severe winters.
Developed mostly by Joseph Gable of Stewartstown, Pennsylvania, Gable Hybrids include some of...
(Purple Splendour Rhododendron, Rhododendron, Waterer Hybrid Rhododendron)
Introduced more than 100 years ago but still widely regarded as the quintessential purple-flowered rhododendron, this Waterer Hybrid bears showy rounded clusters of royal purple flowers in mid- to late spring. The wide-flaring, frilly-edged funnel-shaped blooms have a striking black-purple blotch on their upper lobe. This compact, upright, head-high shrub has large glossy dark green leaves with prominent midribs.
One of the horticultural dynasties of nineteenth and twentieth century England,...
(Catawba Rhododendron, Catawba Rosebay, Purpureum Elegans Rhododendron)
Introduced more than 150 years ago but still popular for its exceptional cold-hardiness and its showy bloom, this Waterer hybrid of Rhododendron catawbiensebears large domed clusters of lavender-purple flowers from mid- to late spring. The wide-flaring, funnel-shaped blooms have a pale blotch and maroon spotting on their upper lobe. This vigorous upright medium-sized shrub has large, elliptic, glossy dark green leaves.
One of the horticultural dynasties of nineteenth and twentieth...
(Purpureum Grandiflorum Rhododendron, Rhododendron, Waterer Hybrid Rhododendron)
Introduced more than 150 years ago but still well worth growing for its exceptional cold-hardiness and colorful blooms, this Waterer Hybrid bears showy rounded clusters of medium purple flowers from mid- to late spring. The wide-flaring, funnel-shaped blooms have a golden orange blotch on their upper lobe. This compact, upright, head-high shrub has large leathery convex leaves.
One of the horticultural dynasties of nineteenth and twentieth century England, the Waterer family introduced a diversity...
(Queen Alice Rhododendron, Rhododendron)
Floriferous and compact, this Rhododendron degronianum var. yakushimanum hybrid bears showy domed clusters of beautiful appleblossom-pink flowers in mid-spring. The funnel-shaped blooms open from rich cherry-red buds. This dense, mounded, waist-high shrub has medium-sized, elliptic, dull green leaves.
Like most rhododendrons, 'Queen Alice' favors chilly winters, moderate summers, partial shade, and highly organic, well-drained, acid soil. Plant it shallowly and mulch...