Two branches of one great genus, grown for the spring flower above all. From fragrant native azaleas to bold evergreen rhododendrons, these are woodland-edge shrubs for cool, acid, dappled ground.
The native deciduous azaleas of the southeastern United States bloom in a long relay, from the pinxters and Piedmont azaleas of March through the flame azaleas of April and May and on into July with the red of Rhododendron prunifolium. And then, once most gardeners have closed the azalea chapter for the year, Rhododendron serrulatum opens. Hammocksweet azalea is the last of the line, flowering in August and September and sometimes later still.
A three-hundred-year-old Japanese garden azalea that does not look quite like a rhododendron, does not look quite like an azalea, and does not really look like anything else. The leaves are narrow green ribbons, three to five millimeters wide and a couple of inches long, closer to willow or fine grass than to the broad rounded foliage of an ordinary tsutsuji. The flowers, opening in late April and May, follow the same grammar: deeply divided into long strap-like petals in lilac-pink to lavender-rose, tangled and knotted at first, then unfurling slowly into a shape that reads, depending on the eye, as a crane fly, a spider, or a piece of decorative garnish. Wabi-sabi made evergreen.
The swamp azalea, Rhododendron viscosum, ordinarily opens white; this selection breaks pink. 'Roseum' is a rose-flushed form of the familiar native, chosen and introduced by Woodlanders from a plant of Aiken County, South Carolina provenance, a home-ground selection that carries the sweet, clove-like fragrance of the species in a warmer color. The swamp azalea ranges widely across the eastern United States, from the Gulf Coast north into New England, threading the wet margins of swamps, bogs, and stream banks where few other flowering shrubs will follow.
The glaucous swamp azalea is a native deciduous shrub of the wetland South and the eastern seaboard, a blue-leaved form of Rhododendron viscosum, the widespread swamp azalea that ranges from the Gulf Coast north into New England. The variety glaucum sets the plant apart with foliage washed in a soft blue-green, most striking on the leaf undersides, which flash pale as a breeze turns them. Where many shrubs falter, this azalea thrives in the consistently moist, even boggy ground of swamps, marshes, and stream banks.
'Koromo Shikibu' is the spider azalea, and there is nothing else in the genus quite like the flower. Instead of the usual funnel, each bloom splits into narrow, strap-like petals that spread apart like the legs of a starfish or a spider, lavender to purplish-pink, spotted darker at the base, and carried in such profusion in spring that the whole shrub seems to shimmer. Once seen, the flower is not forgotten.
A spontaneous hybrid, probably including Rhododendron alabamense, R. canescens, and R. flammeum, and blooming in mid-spring. Woodlanders regularly offers several numbered selections in our "Pastel Series," which we introduced, and this is number four. A happy blend of colors that adds interest to any garden.
'Addison' began as a chance seedling of the Alabama azalea, Rhododendron alabamense, and grew into something none of the parents quite predicted. Surely a hybrid, though the exact parentage remains unknown, the plant carries large, dense, dome-shaped terminal clusters that blend shades of yellow, pink, and white in a single truss, a multicolored effect striking enough that the selection first went by the name 'Stunning'. Charles Webb, a good friend of Woodlanders, spotted and selected the seedling in Florida, and the plant now carries the name of one of his young granddaughters.
This hardy hybrid azalea is a piece of Woodlanders history, a deliberate cross made by the nursery's late founder, Robert Mackintosh. Mackintosh crossed the native roseshell azalea, Rhododendron prinophyllum, with the old hybrid group known as R. x kosterana, or mollis azalea, and the result is an upright, large-flowered deciduous shrub carrying bold orange trusses each marked with a splash of yellow.
'Casille' arose spontaneously, a chance hybrid among three of the southeastern native azaleas: the white, lemon-scented Alabama azalea, Rhododendron alabamense; the fragrant pink Piedmont azalea, R. canescens; and the fiery, unscented Oconee azalea, R. flammeum. From that three-way mingling came a deciduous shrub that blooms in mid-spring in a lively pastel blend, the flowers shifting through pink, white, and soft yellow with a subtle sweetness inherited from the fragrant parents. An exclusive Woodlanders introduction, the plant was named by George Mitchell for his wife.
