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Vick, Albert F. W.
Rhododendron canadense (L.) Torr.
Synonym(s): Azalea canadensis, Rhodora canadensis
USDA Symbol: rhca6
Rhodora is a rather scrawny, erect-branched shrub that seldom grows over 3-4 ft. tall. Oval leaves are hairy underneath and distinctly gray-green. The principal beauty lies in the showy clusters of rose-purple flowers occuring in terminal clusters. The flowers are different from other member of the genus; the 3 upper lobes are almost united to the end and erect, the 2 lower lobes are oblong, divided and spreading. A deciduous shrub with few-flowered terminal clusters of lavender flowers.
This small northern shrub has very showy flowers that open before or with its leaves.
Plant CharacteristicsDuration: Perennial Habit: Shrub Leaf:
Dark Green Flower:
Fruit: Size Class:
Bloom InformationBloom Color: Pink , Purple
Bloom Time: Apr , May
, VT Canada: NB
, QC Native Distribution:
Nf. to e. Ont., s. to e. PA
& n. NJ Native Habitat:
Swamps; moist, high altitude woods
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade
Soil Moisture: Dry , Moist , Wet
Soil pH: Acidic (pH<6.8)
CaCO3 Tolerance: None
Soil Description: Cold, wet, acid or peaty soil.
Conditions Comments: Requires a cool climate. Good cultural practices reduce the incidence of disease and insect damage.
BenefitUse Wildlife: Bees
Use Food: done not eat
Warning: Rhododendrons contain poisonous substances and should not be ingested by humans or animals. Honey made from flowers also may be toxic. POISONOUS PARTS: All parts. Highly Toxic, May be Fatal if eaten. Symptoms include 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. Toxic Principle: Andromedotoxin. (Poisonous Plants of N.C.)
Conspicuous Flowers: yes
Larval Host: Columbia silkmoth
PropagationDescription: Sow tiny seeds on peat under mist or a plastic tent.
Seed Collection: Not Available
Seed Treatment: No pretreatment is necessary.
Commercially Avail: yes
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Suppliers Directory
According to the inventory provided by Associate Suppliers, this plant is available at the following locations:
- Warrensville, NC
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Delaware Nature Society
- Hockessin, DE
Record Last Modified: 2007-01-01
Research By: TWC Staff