Rhododendron hirsutum

Hairy Rhododendron

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Alpine evergreen shrub with hairy leaves and pink-purple bell-shaped flowers, native to European mountains; thrives in acidic soil and cool climates.
yard Outdoor plants wb_sunny Shade / Half-shade pets Not pet-safe
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Plant Details

Common Name Hairy Rhododendron
Family Ericaceae
Genus Rhododendron
Species Hirsutum
Origin European Alps (Austria, Italy, etc.)
Blooming Spring to early summer with clusters of bell-shaped flowers.
Leaf Color Dark green (densely hairy beneath)
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Acidic peat-based mix (ericaceous soil), excellent drainage, strictly avoid calcareous substrates.

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Watering

Keep consistently moist but not waterlogged. Use rainwater or distilled (low lime). Reduce in winter dormancy.

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Sunlight & Care

Bright indirect light or partial sun. Avoid scorching afternoon heat; prefers cool conditions.

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Fertilization

Acidic rhododendron fertilizer, applied sparingly during active growth (spring/summer).

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Pruning

Light pruning after flowering to maintain shape; remove dead wood in spring.

Pest Control Aphid Rhododendron 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 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 77°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1000 – 8000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
500 – 2000
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
30% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1200
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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