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Swamp Azalea

Rhododendron viscosum

  • Fragrant Late-Summer Blooms: Sweet Spicy-Clove Scent When Others Fade
  • Cold Hardy: Thrives in Zones 4-9
  • Grows 3-5 ft Tall and Wide
  • Heat Tolerant, Rabbit Resistant
  • Native, Pollinator-Friendly - Attracts Bees and Butterflies
Regular price $6800
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Outside your zone (): not guaranteed Why

Rated for zones 4 to 9. Great in a pot brought indoors for winter, or as an annual.

Houseplant: grows indoors in any zone
Will it grow in your garden?

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Plant Size

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Specifications

Plant specifications
Hardiness Zone 4a to 9b
Sunlight Partial shade
Height 3-5 ft
Width 3-5 ft
Growth Rate Moderate
Watering Needs High
Preferred Soil Peaty
Landscape Use Border, Woodland Garden, Rain Garden, Cutting Garden
Growth Habit Spreading
Blooms In Spring, Summer
Flower Color White
Foliage Color Green
Fragrant Yes
Native Yes
Native To Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New York, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia
+17 moreshow less
Pet Safety Toxic to pets, Toxic to horses
Plant Characteristics Cold hardy, Native, Flowering, Fragrant, Wet Soils, Attracts pollinators, Container Friendly
Botanical Name Rhododendron viscosum
Does Not Ship To AK, HI, ID, MT, PR
A
Anonymous (United States)

Frequently Asked Questions

Does Swamp Azalea tolerate wet or flooded soil conditions?

  • Yes, Swamp Azalea thrives in wet, boggy soils and can handle flooded conditions that would kill most other shrubs. This moisture-loving native is specifically adapted for rain gardens, wetlands, and pond edges in zones 4-9. Plant it in your wettest spots where other plants struggle.

How much sun or shade does Swamp Azalea require?

  • Swamp Azalea thrives in filtered sunlight and partial shade, making it ideal for woodland gardens under tall trees. This native shrub adapts well to dappled light conditions where many other flowering shrubs struggle. Plant in areas with morning sun and afternoon shade for optimal blooms and foliage color, available at naturehills.com.

What mulching is recommended for Swamp Azalea?

  • Apply 2-3 inches of organic mulch like shredded leaves or bark around your Swamp Azalea to retain the consistent moisture it craves. Keep mulch a few inches away from the base to prevent rot and maintain good air circulation.

How is Swamp Azalea shipped and does it arrive bare root or potted?

  • Swamp Azalea typically ships as a potted plant during the optimal planting seasons of spring and fall. The 3-5 foot mature shrub establishes best when planted with its root system intact. Plant immediately upon arrival for best results in zones 4-9.

What is the mature size and spread of Swamp Azalea plants for sale?

  • Swamp Azalea typically grows 3-5 feet tall and wide, making it an ideal mid-sized landscape shrub. In optimal wet conditions, these native plants can grow larger than their standard compact size. Shop at Nature Hills for this versatile shrub that fits perfectly in rain gardens and naturalized areas.

Will Swamp Azalea survive winter in zone 4 or colder climates?

  • Swamp Azalea is cold-hardy through USDA zone 4, making it suitable for most northern climates. This native shrub naturally tolerates harsh winters and will reliably return each spring. Provide some winter wind protection in the coldest zone 4 areas for best results.