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Rhododendron viscosum

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

Woody, evergreen or deciduous shrubs that forms a thicket with age; loose open habit.  Toleartes wet planting sites.

Seasons of Interest:

Foliage: Fall, crimson  Bloom: Spring/Summer, May-July

Wildlife:  Members of the genus Rhododendron support the following specialized bee: Andrena (Andrena) cornelli Tolerates damage by rabbits.

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. Early flowering makes it susceptible to spring freezes.

Compare this Plant to: R. arborescens, RatlanticumR. vaseyi

More information on Rhododendron.

Cultivars / Varieties:
  • 'Lemon Drop'
  • 'Pink Mist'
  • 'Pink Rocket'
  • 'Viscosum'
Tags:
#bees#evergreen#deciduous#poisonous#drought tolerant#wildlife plant#nectar plant#wet sites#specialized bees#pollinator plant
 
Cultivars / Varieties:
  • 'Lemon Drop'
  • 'Pink Mist'
  • 'Pink Rocket'
  • 'Viscosum'
Tags:
#bees#evergreen#deciduous#poisonous#drought tolerant#wildlife plant#nectar plant#wet sites#specialized bees#pollinator plant
  • Attributes:
    Genus:
    Rhododendron
    Species:
    viscosum
    Family:
    Ericaceae
    Life Cycle:
    Woody
    Wildlife Value:
    Members of the genus Rhododendron support the following specialized bee: Andrena (Andrena) cornelli. Tolerates damage by rabbits.
    Dimensions:
    Height: 2 ft. 0 in. - 8 ft. 0 in.
    Width: 3 ft. 0 in. - 8 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Native Plant
    Poisonous
    Shrub
    Leaf Characteristics:
    Broadleaf Evergreen
    Deciduous
    Habit/Form:
    Open
    Spreading
  • Cultural Conditions:
    Light:
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Drainage:
    Good Drainage
    Occasionally Wet
    Available Space To Plant:
    3 feet-6 feet
    Usda Plant Hardiness Zone:
    4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
  • Fruit:
    Fruit Type:
    Capsule
    Fruit Description:
    Elongated capsule
  • Flowers:
    Flower Color:
    White
    Flower Value To Gardener:
    Fragrant
    Showy
    Flower Bloom Time:
    Summer
    Flower Shape:
    Tubular
    Flower Petals:
    4-5 petals/rays
    fused petals
    Flower Description:
    Very fragrant, sticky white flowers in early summer a terminal cluster, tubular, 5-parted.
  • Leaves:
    Leaf Characteristics:
    Broadleaf Evergreen
    Deciduous
    Leaf Color:
    Green
    Red/Burgundy
    Leaf Type:
    Simple
    Leaf Arrangement:
    Alternate
    Leaf Margin:
    Entire
    Serrate
    Hairs Present:
    No
    Leaf Description:
    Alternate, simple, lustrous green leaves; smooth- or toothed-margined
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Landscape Location:
    Houseplants
    Naturalized Area
    Woodland
    Attracts:
    Bees
    Pollinators
    Specialized Bees
    Resistance To Challenges:
    Drought
    Rabbits
    Wet Soil
    Problems:
    Poisonous to Humans
  • 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, coma.
    Poison Toxic Principle:
    Andromedotoxin
    Causes Contact Dermatitis:
    No
    Poison Part:
    Bark
    Flowers
    Fruits
    Leaves
    Roots
    Seeds
    Stems