Rhododendron viscosum

Swamp Azalea

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Deciduous shrub native to wetlands, thriving in acidic soil with high moisture. Known for fragrant white flowers and autumn foliage color.
yard Outdoor plants wb_sunny Shade / Half-shade pets Not pet-safe
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Plant Details

Common Name Swamp Azalea
Family Ericaceae
Genus Rhododendron
Species Viscosum
Origin Eastern North America
Blooming Late spring to early summer, fragrant white blooms
Leaf Color Green (turning red/orange in autumn)
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Highly acidic peat mix with perlite, pH 4.5-6.0, ensure excellent drainage despite moisture needs

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Watering

Keep soil consistently moist but not waterlogged; high humidity essential for indoor growth

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Sunlight & Care

Bright indirect light or morning sun; protect from intense afternoon heat indoors

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Fertilization

Use acid-loving plant fertilizer in spring, reduce significantly after blooming

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Pruning

Light pruning immediately after flowering to maintain shape

Pest Control Aphid Azalea Lace Bug Spider Mite

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 1 month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 7 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
50° – 82°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
50% – 90%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
2000 – 6000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
300 – 1500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
40% – 75%
% volumetric
Water content in the growing medium
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Soil EC
200 – 800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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