Plant DetailShow Menu

Rhododendron x hybridum 'Glenn Dale'

Common Name(s):

Previously known as:

  • Rhododendron hybrida 'Glenn Dale'
Phonetic Spelling
roh-do-DEN-dron hy-BRID-um
This plant has low severity poison characteristics.
See below
Description

Many cultivars and colors; cold tolerant.

Wildilfe Value: 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.

Form:  Upright or spreading

 

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

More information on Rhododendron.

Profile Video:
See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#bees#evergreen#hardy#showy flowers#fall color#wildlife plant#nectar plant#specialized bees#pollinator plant#problem for cats#problem for dogs#problem for horses
 
Cultivars / Varieties:
Tags:
#bees#evergreen#hardy#showy flowers#fall color#wildlife plant#nectar plant#specialized bees#pollinator plant#problem for cats#problem for dogs#problem for horses
  • Attributes:
    Genus:
    Rhododendron
    Family:
    Ericaceae
    Wildlife Value:
    Members of the genus Rhododendron support the following specialized bee: Andrena (Andrena) cornelli.
    Dimensions:
    Height: 4 ft. 0 in. - 6 ft. 0 in.
    Width: 3 ft. 0 in. - 4 ft. 0 in.
  • Whole Plant Traits:
    Plant Type:
    Shrub
    Habit/Form:
    Erect
    Spreading
    Texture:
    Medium
  • Cultural Conditions:
    Soil Texture:
    High Organic Matter
    Soil pH:
    Acid (<6.0)
    Soil Drainage:
    Good Drainage
    USDA Plant Hardiness Zone:
    6b, 6a, 7b, 7a, 8b, 8a
  • Flowers:
    Flower Color:
    Gold/Yellow
    Orange
    Pink
    Purple/Lavender
    Red/Burgundy
    White
    Flower Value To Gardener:
    Showy
    Flower Description:
    Many colors, white, red, orange-red, pink to purple; very showy, vary from single to double
  • Leaves:
    Leaf Color:
    Green
    Leaf Feel:
    Glossy
    Hairs Present:
    No
    Leaf Description:
    Green in summer, varied degree of glossiness, sizes, downiness; some with fall color
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Attracts:
    Pollinators
    Specialized Bees
    Problems:
    Problem for Cats
    Problem for Dogs
    Problem for Horses
  • Poisonous to Humans:
    Poison Severity:
    Low
    Poison Symptoms:
    Vomiting (not in horses), diarrhea, weakness, cardiac failure
    Poison Toxic Principle:
    Grayantoxin
    Causes Contact Dermatitis:
    No