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Rosebay Rhododendron

Other Common Name(s):

Other plants called Rosebay:

Phonetic Spelling
rho-doh-DEN-dron
This plant has high severity poison characteristics.
See below
Description

Woody, evergreen or deciduous shrubs in the Ericaceae family.  They prefer moist, well-drained, acidic soils and dappled shade.   They do not tolerate dense clay, so if you have clay soils, amend with organic material.  You can also plant the root ball high in the soil to help with drainage issues.  They withstand pruning well after flowering and are low maintenance.   It can be used as a houseplant or in the landscape as a woody shrub, it is at home as an understory shrub in a  forest woodland or natural area.

Wildlife Value: Flowers attract humingbirds. Members of the genus Rhododendron support the following specialized bee: Andrena (Andrena) cornelli.

Insects, Diseases, and Other Plant Problems:  Rhododendrons are susceptible to insect and disease problems.  Insect problems include aphids, borers, lacebugs, leafhoppers, mealybugs, mites, nematodes, scale, thrips and whitefly.  Diseases include canker, crown rot, root rot, leaf spot, rust, and powdery mildew.  Full sun can scorch the leaves and the roots rot if soil does not drain well.   A healthy plant in the right place with proper maintenance should have few problems. This plant is frequently damaged by deer.

 

VIDEO Created by Elizabeth Meyer for "Trees, Shrubs and Conifers" a plant identification course offered in partnership with Longwood Gardens.

Profile Video:
See this plant in the following landscapes:
Wild Side- A Shady Garden Flower Bonanza Garden
Cultivars / Varieties:
'Dr. A. Blok', Encore® Series, 'Girard's Crimson', 'Golfer', 'Graziella', 'Knaphill and Exbury Azaleas', 'Maximum', PJM Group, R. alabamense, 'Ramapo', R. arborescens, R. atlanticum, R. atrosanguineus, R. austrinum, R. calensulaceum, R. canescens, R. catawbiense, R. cumberlandense, R. eriocarpum, R. flammeum, R. impeditum, R. indicum, R. kaempferi, R. maximum, R. minus, R. mucronulatum, R. periclymenoides, R. ponticum, R. prunifolium, R. roseum, R. schlippenbachii, R. vaseyi, R. viscosum, R. yakushimanum, 'Silver Bear', Southern Indica Hybrids, 'Strawberry Ice', 'Windbeam', x bakeri 'Clyo Red', x hybridum 'Glenn Dale', x hybridum 'Gunrei Satzuki', x 'Stonewall Jackson'
Tags:
#bees#evergreen#showy flowers#deciduous#understory#nectar plant#native bees#woody#low maintenance#tsc#dappled shade#specialized bees#cpp#woodland#naturalizes#pollinator plant#problem for cats#tsc-s#problem for dogs#problem for horses
 
Cultivars / Varieties:
'Dr. A. Blok', Encore® Series, 'Girard's Crimson', 'Golfer', 'Graziella', 'Knaphill and Exbury Azaleas', 'Maximum', PJM Group, R. alabamense, 'Ramapo', R. arborescens, R. atlanticum, R. atrosanguineus, R. austrinum, R. calensulaceum, R. canescens, R. catawbiense, R. cumberlandense, R. eriocarpum, R. flammeum, R. impeditum, R. indicum, R. kaempferi, R. maximum, R. minus, R. mucronulatum, R. periclymenoides, R. ponticum, R. prunifolium, R. roseum, R. schlippenbachii, R. vaseyi, R. viscosum, R. yakushimanum, 'Silver Bear', Southern Indica Hybrids, 'Strawberry Ice', 'Windbeam', x bakeri 'Clyo Red', x hybridum 'Glenn Dale', x hybridum 'Gunrei Satzuki', x 'Stonewall Jackson'
Tags:
#bees#evergreen#showy flowers#deciduous#understory#nectar plant#native bees#woody#low maintenance#tsc#dappled shade#specialized bees#cpp#woodland#naturalizes#pollinator plant#problem for cats#tsc-s#problem for dogs#problem for horses
  • Attributes:
    Genus:
    Rhododendron
    Family:
    Ericaceae
    Life Cycle:
    Woody
    Country Or Region Of Origin:
    USA, NC, Asia
    Distribution:
    Throughout
    Wildlife Value:
    Flowers attract humingbirds. Members of the genus Rhododendron support the following specialized bee: Andrena (Andrena) cornelli.
  • Whole Plant Traits:
    Plant Type:
    Poisonous
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Rounded
    Maintenance:
    Low
  • Cultural Conditions:
    Light:
    Dappled Sunlight (Shade through upper canopy all day)
    Soil Texture:
    High Organic Matter
    Loam (Silt)
    Sand
    Soil pH:
    Acid (<6.0)
    Soil Drainage:
    Good Drainage
  • Flowers:
    Flower Color:
    Pink
    White
    Flower Value To Gardener:
    Showy
    Flower Size:
    3-6 inches
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Feel:
    Leathery
    Leaf Type:
    Simple
    Leaf Arrangement:
    Alternate
    Leaf Shape:
    Elliptical
    Leaf Margin:
    Entire
    Hairs Present:
    No
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Landscape Location:
    Naturalized Area
    Woodland
    Design Feature:
    Small groups
    Attracts:
    Hummingbirds
    Pollinators
    Specialized Bees
    Problems:
    Problem for Cats
    Problem for Dogs
    Problem for Horses
  • Poisonous to Humans:
    Poison Severity:
    High
    Poison Symptoms:
    Salivation, watering of eyes and nose, abdominal pain, loss of energy, depression, nausea and vomiting, diarrhea, weakness, difficult breathing, progressive paralysis of arms and legs, cardiac failure, coma.
    Poison Toxic Principle:
    Andromedotoxin, Grayantoxin
    Causes Contact Dermatitis:
    No
    Poison Part:
    Bark
    Flowers
    Fruits
    Leaves
    Roots
    Sap/Juice
    Seeds
    Stems