Alphabetical Plant Listing

Rhododendron viscosum (Swamp Azalea)

Swamp Azalea, Swamp Honeysuckle, White Swamp Honeysuckle, Clammy Azalea, Cory Azalea, Hammock Sweet Azalea, Deciduous Azalea, Very Late Season Rhododendron


Prized for its strongly-scented flowers and beautiful fall foliage, Rhododendron viscosum, commonly known as Swamp Azalea, is a very appealing native to the swamps of the eastern United States, from Maine to Alabama, and westward to Texas. This bushy, medium-sized, deciduous shrub bears funnel-shaped, white flowers, often tinged pink, with long slender tubes. Held in small clusters of 3-12 flowers, they bloom profusely after the leaves emerge, in early summer and exude a strong clove-like perfume. The foliage of lustrous, elliptic, dark green leaves turns brilliant shades of yellow, orange and purple in fall, for a great colorful show. Exceptionally cold-hardy, this late season Azalea can withstand temperatures as low as to -20°F (-29°C). A wonderful landscape plant that deserves a place near a patio, deck or living area, where its delightful fragrance can be enjoyed. 

  • Swamp Azalea grows with a loose, upright, spreading habit, up to 5-8 ft. tall (150-240 cm) and 7-10 ft. wide (210-300 cm). Will slowly naturalize by root suckers
  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society
  • A sun to part shade lover, this plant is easily grown in moist, acidic, humusywell-drained soils. This Azalea species is tolerant of wet soils, including those with poor drainage. While periodic flooding is tolerated, it cannot remain permanently underwater. Prefers a sun dappled shade or high open part shade. Foliage may scorch in full sun unless soils are kept uniformly moist. Plant shallowly in a location protected from strong winter winds. Protect from frost to prevent damage to flowers. Mulch annually with leaf mould to retain moisture, control weeds, and cool the soil.
  • Perfect for shrub borders or mixed borders and shade gardens. Excellent cut flower too!
  • Attracts butterflies, hummingbirds and birds
  • Removing spent flowers promotes new growth.
  • All parts of plant are poisonous if ingested

Learn How To Plant And Care for Your Azalea or Rhododendron

Azaleas and Rhododendrons are not difficult to grow but have special cultural requirements.Read More

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Requirements

Hardiness 3 – 9
Heat Zones 1 – 9
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17
Plant Type Shrubs
Plant Family Azaleas - Rhododendrons, Rhododendrons - Azaleas
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early)
Fall
Height 5' – 8' (150cm – 240cm)
Spread 7' – 10' (210cm – 3m)
Spacing 84" – 120" (210cm – 300cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Native Plants United States, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, Southwest, Oklahoma, Texas
Tolerance Rabbit
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage, Traditional Garden

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Great Plant Combination Ideas with Azaleas - Rhododendrons

Guides with Azaleas - Rhododendrons

Great Plant Combination Ideas with Rhododendrons - Azaleas

Guides with Rhododendrons - Azaleas


Photo courtesy of Natural Landscapes Nursery

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 3 – 9
Heat Zones 1 – 9
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17
Plant Type Shrubs
Plant Family Azaleas - Rhododendrons, Rhododendrons - Azaleas
Exposure Full Sun, Partial Sun
Season of Interest Summer (Early)
Fall
Height 5' – 8' (150cm – 240cm)
Spread 7' – 10' (210cm – 3m)
Spacing 84" – 120" (210cm – 300cm)
Water Needs Average
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Native Plants United States, Northeast, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Southeast, Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, Southwest, Oklahoma, Texas
Tolerance Rabbit
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles City and Courtyard, Informal and Cottage, Traditional Garden

Great Plant Combination Ideas with Azaleas - Rhododendrons

Guides with Azaleas - Rhododendrons

Great Plant Combination Ideas with Rhododendrons - Azaleas

Guides with Rhododendrons - Azaleas

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