Cypripedium calceolus

European Lady's Slipper

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Rare terrestrial orchid with a distinctive yellow slipper-shaped pouch and maroon-tipped petals. A protected woodland species requiring cool, shaded conditions.
yard Outdoor plants wb_sunny Shade / Half-shade pets Not pet-safe
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Plant Details

Common Name European Lady's Slipper
Family Orchidaceae
Genus Cypripedium
Species Calceolus
Origin Europe, Asia
Blooming Late spring to early summer, fragrant flowers
Leaf Color Grey-green to bright green
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly close No
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Care & Maintenance

terrain
Soil

Loamy, humus-rich, well-draining calcareous soil mix or specialized orchid bark blend.

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Watering

Keep consistently moist but not waterlogged during growth. Reduce watering after foliage dies back in autumn.

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Sunlight & Care

Deep shade required during summer; prefers dappled light woodland conditions. Avoid direct sun which scorches leaves.

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Fertilization

Feed weakly with balanced fertilizer every two weeks during active growth (April-June). Stop feeding after flowering.

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Pruning

Remove dead flower stalks after blooming. Allow foliage to yellow and die naturally before cutting at soil level.

Pest Control Aphid Slug Snail Thrip

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 2 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° – 75°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
500 – 4000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
5 – 20
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
30% – 60%
% 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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