USDA Hardiness Zone 4. Swamp Azalea can be grown in full sun if regular water is available. Copyright © 2002-2020 Shady Gardens Nursery. Rhododendron colemanii Red Hills Azalea. Rhododendron canescens. The swamp azalea is fragrant and blooms in the spring and into the summer in some areas. The flowers have a spicy, sweet fragrance. Data Source and References for Rhododendron viscosum (swamp azalea) from the USDA PLANTS database Gallon plant. The roots should not be planted more than 12 inches below the surface. Price includes delivery. It can be distinguished by its glabrous branchlets, red style and filaments (which contrast with the white corollas), and distinctive seeds that lack loose, expanded testae. Keep partial or dappled sunlight on your swamp azalea. It is wet site tolerant. The plant can grow to anywhere from 6 to 10 feet in height and width. // . Swamp azalea, Rhododendron viscosum, is perennial shrub azalea that grows in USDA zones 3 through 9. Swamp azalea, Rhododendron viscosum, is perennial shrub azalea that grows in USDA zones 3 through 9. Price includes delivery. Browse pictures and read growth / cultivation information about Rhododendron Species, Swamp Azalea, Swamp Honeysuckle, Clammy Azalea (Rhododendron viscosum) supplied by member gardeners in … Foliage turns a striking combination of orange and maroon before dropping for the season. JavaScript is disabled. Oconee Azalea. Rhododendron Chapmanii Chapman's Rhododendron. Keep swamp azalea in fertile soil that is always moist. ... Deciduous Azalea with very fragrant yellow blooms April - May. Swamp azalea. See below Description. Found near swamps, bogs and stream margins. Southern wetland flora: Field office guide to plant species. Woody, evergreen or deciduous shrubs that forms a thicket with age; loose open habit. 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