Primula sieboldii

Siebold's Primrose

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A charming herbaceous perennial featuring umbrella-like clusters of pink, red, or white flowers rising above a rosette of grey-green leaves. Thrives in cool conditions and high humidity.
yard Outdoor plants wb_sunny Half-shade pets Not pet-safe
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Plant Details

Common Name Siebold's Primrose
Family Primulaceae
Genus Primula
Species Sieboldii
Origin Japan / Korea
Blooming Spring, sometimes repeat bloom in cool conditions
Leaf Color Grey-green / Deep green
Sunlight Half-shade
Category Outdoor plants
Pet Friendly close No
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Care & Maintenance

terrain
Soil

Rich humus-based mix with good drainage; peat and perlite blend preferred

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Watering

Keep soil consistently moist but not waterlogged. High humidity required. Do not wet flowers to prevent rot.

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Sunlight & Care

Bright indirect light only. Avoid direct sun which scorches leaves. Cool environment essential.

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Fertilization

Apply diluted fertilizer every 2 weeks during active growth (spring). Stop after flowering to allow dormancy.

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Pruning

Remove spent flower stalks and yellowing leaves promptly to maintain plant health.

Pest Control Aphid Fungus Gnat Mealybug Slug

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
60% – 90%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
500 – 8000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
200 – 1500
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
200 – 800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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