Smooth Azalea
Rhododendron arborescens
Found in rocky riversides, wooded stream banks, swamps, high elevation forests, shrub balds. Weakley, Flora of the Southeastern United States (2025), South Central edition What its natural habitat tells you
90
Keystone
Native to Alabama. How scores work Is it native here?
Profile 100%
- Height
- 8–20 feet
- Spread
- 8–20 feet
- Light
- Full sun, Partial shade
- Soil moisture
- Usually moist
Space about 14 ft apart from its recorded spread. Enter your bed size for a count
Will it fit your yard?
At a glance
- Life cycle
- Woody perennial
- Leaves
- Deciduous
- Bloom
- May to July
- Fruiting season
- July to October
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Recorded in 23 Alabama counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
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Streams, rivers and their banks
Flowing water and its banks, bars and rocky shoals.
High mountain forests of beech, yellow birch and sugar maple, including boulderfield forests.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Alabama. Shared habitat, not food. 132 animals.
- Black VultureCoragyps atratus
- Black-billed CuckooCoccyzus erythropthalmus
- Blue-winged WarblerVermivora pinus
- Brown ThrasherToxostoma rufum
- CanvasbackAythya valisineria
- Cerulean WarblerDendroica cerulea
- Eastern Wood-peweeContopus virens
- GadwallAnas strepera
- Golden-winged WarblerVermivora chrysoptera
- Great Crested FlycatcherMyiarchus crinitus
- Hermit ThrushCatharus guttatus
- Hooded WarblerWilsonia citrina
- KilldeerCharadrius vociferus
- Lark SparrowChondestes grammacus
- Least BitternIxobrychus exilis
- Least FlycatcherEmpidonax minimus
- Lesser ScaupAythya affinis
- Little Blue HeronEgretta caerulea
- Northern Rough-winged SwallowStelgidopteryx serripennis
- OvenbirdSeiurus aurocapilla
- Peregrine FalconFalco peregrinus
- Pileated WoodpeckerDryocopus pileatus
- Red-bellied WoodpeckerMelanerpes carolinus
- Red-shouldered HawkButeo lineatus
Ecological relationships
Who uses this plant?
52CaterpillarsGenus host records with ranges including AL
Genus host records with ranges including AL · Rhododendron
- Acharia stimuleaSaddleback Caterpillar Moth
- Acronicta oblinitaSmeared Dagger
- Acronicta tritonaGray Dagger, Triton Dagger
- Amphipyra pyramidoidesMiranda Underwing, Copper Underwing, Copper Amphipyra
- Apatelodes torrefactaSpotted Apatelodes
- Archips argyrospilaFruit-Tree Leafroller Moth
- Automeris ioIo Moth
- Callophrys augustinusThe Brown Elfin
- Callosamia prometheaPromethea Silkmoth, Promethea Moth
- Caloptilia violacellaTick-Trefoil Caloptilia
Show all 52
- Catocala andromedaeAndromeda Underwing
- Choristoneura rosaceanaOblique-Banded Leafroller Moth, Rosaceous Leaf Roller
- Coelodasys unicornisUnicorn Caterpillar Moth
- Darapsa choerilusAzalea Sphinx
- Darapsa versicolorHydrangea Sphinx
- Datana majorMajor Datana, Azalea Caterpillar
- Datana ministraYellow-Necked Caterpillar Moth
- Dichomeris ligulellaPalmerworm
- Egira alternansAlternate Woodling
- Hyalophora cecropiaCecropia Silkmoth, Cecropia Moth
- Hyles lineataWhite-Lined Sphinx
- Hyphantria cuneaFall Webworm
- Megalopyge opercularisSouthern Flannel Moth, Puss Caterpillar
- Melanolophia canadariaCanadian Melanolphia, Variable Redmarked Looper
- Morrisonia confusaConfused Woodgrain
- Oedemasia concinnaRed-Humped Caterpillar, Red-Humped Appleworm
- Oiketicus abbotiiAbbot's Bagworm Moth
- Olethreutes permundanaRaspberry Leafroller
- Orgyia leucostigmaWhite-Marked Tussock Moth
- Orthosia hibisciSpeckled Green Fruitworm Moth, Speckled Green Quaker
- Palthis angulalisDark-Spotted Palthis
- Papilio troilusSpicebush Swallowtail
- Platynota flavedanaBlack-Shaded Platynota
- Platynota stultanaOmnivorous Leafroller
- Prolimacodes badiaSkiff Moth, Skiff Caterpillar
- Rheumaptera prunivorataFerguson's Scallop Shell, Cherry Scallop Shell
- Satyrium kingiKing's Hairstreak
- Satyrium liparopsStriped Hairstreak
- Schizura ipomaeaeMorning-Glory Prominent, Checkered-Fringe Prominent
- Scopula limboundataLarge Lace-Border
- Sparganothis sulfureanaSparganothis Fruitworm Moth, Sulfur Leafroller, False Yellow-Head
- Sphinx kalmiaeFawn Sphinx, Laurel Sphinx
- Spodoptera eridaniaSouthern Armyworm Moth
- Spodoptera latifasciaOrange-Striped Armyworm, Velvet Armyworm Moth
- Spodoptera ornithogalliYellow-Striped Armyworm Moth, Cotton Cutworm
- Strymon melinusGray Hairstreak
- Thyridopteryx ephemeraeformisEvergreen Bagworm Moth
- Trichoplusia niNi Moth, Cabbage Looper Moth
- Xanthotype urticariaFalse Crocus Geometer
- Epinotia septemberana
- Paralobesia rhoifructana
- Tulsa finitella
24BeesSoutheastern regional records
Southeastern regional records · Rhododendron
Individual names are not available yet.
Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
2Specialist beesPollen specialists
Pollen specialists · Rhododendron
- Andrena carolina
- Andrena cornelli
5BirdsRecorded genus food-resource interactions; not a state feeding claim
Recorded genus food-resource interactions; not a state feeding claim · Rhododendron
- Bonasa umbellusRuffed Grouse
- Falcipennis canadensisSpruce Grouse
- Lagopus lagopusWillow Ptarmigan
- Pinicola enucleatorPine Grosbeak
- Plectrophenax nivalisSnow Bunting
Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening
No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects
Growing and identification
Plant details
- Family
- Ericaceae
- Hardiness
- Zones 4a–7b
- Soil pH
- Acidic
- Flower color
- Yellow, pink or white
- Growth rate
- Moderate
- Growth habit
- Several stems
- Foliage color
- Dark green
- Fruit begins
- July
- Fruit ends
- October
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “Late May to July” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Flower color · “Yellow, pink or white” · NC Extension Plant Toolbox (ranked first; USDA PLANTS, Lady Bird Johnson Wildflower Center differ)
- Foliage color · “Dark green” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Fruit begins · “July” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Fruit ends · “October” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition (ranked first; USDA PLANTS differs) · Carolinas and Georgia
- Growth habit · “Several stems” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Growth rate · “Moderate” · USDA PLANTS · Nationwide species characteristics; local growing conditions may vary
- Hardiness · “Zones 4a–7b” · NC Extension Plant Toolbox
- Height · “8–20 feet” · NC Extension Plant Toolbox (ranked first; USDA PLANTS, Lady Bird Johnson Wildflower Center differ)
- Leaves · “Deciduous” · NC Extension Plant Toolbox
- Life cycle · “Woody perennial” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Light · “Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox (ranked first; Tennessee Smart Yards, Lady Bird Johnson Wildflower Center differ)
- Soil · “Moist; Occasionally wet” · NC Extension Plant Toolbox (ranked first; Tennessee Smart Yards, Lady Bird Johnson Wildflower Center differ)
- Soil pH · “Acidic” · NC Extension Plant Toolbox
- Spread · “8–20 feet” · NC Extension Plant Toolbox
Also known as
Sweet Azalea
Conservation status
| Alabama rank | SNR |
|---|---|
| Global rank | G4G5 |
| AL status | Not verified |
| Federal status | Not verified |
In your garden
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Choose a county to begin.
Sources
- Alabama Plant Atlas
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications