Quercus

Smooth Azalea

Rhododendron arborescens

Native to Kentucky (estimated)

Ecological relationships

Who uses this plant?

54CaterpillarsGenus host records with ranges including KY

Genus host records with ranges including KY · 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 54
  • Catocala andromedaeAndromeda Underwing
  • Choristoneura rosaceanaOblique-Banded Leafroller Moth, Rosaceous Leaf Roller
  • Clepsis persicanaWhite Triangle Tortrix
  • 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
  • Eupsilia sidusSidus Sallow
  • Fishia illocataWandering Brocade
  • Hyalophora cecropiaCecropia Silkmoth, Cecropia Moth
  • Hyles lineataWhite-Lined Sphinx
  • Hyphantria cuneaFall Webworm
  • Megalopyge opercularisSouthern Flannel Moth, Puss Caterpillar
  • Melanchra assimilisBlack Arches
  • Melanolophia canadariaCanadian Melanolphia, Variable Redmarked Looper
  • Morrisonia confusaConfused Woodgrain
  • Oedemasia concinnaRed-Humped Caterpillar, Red-Humped Appleworm
  • 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
  • Polygonia progneGray Comma
  • Probole nepiasariaHeath Probole
  • Prolimacodes badiaSkiff Moth, Skiff Caterpillar
  • Rheumaptera prunivorataFerguson's Scallop Shell, Cherry Scallop Shell
  • 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
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
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
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
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
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

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
Summer
Fruit ends
Summer

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
Also known as

Smooth Azalea; Sweet Azalea

Conservation status

Kentucky rankS3S4
Global rankG4G5
KY statusNot verified
Federal statusNot verified

Conservation source Global and federal source

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