Polypodium vulgare Cornubiense

Cornish Rock Fern

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Evergreen fern with leathery, lobed fronds. Hardy rhizomatous plant suitable for shade gardens and indoor containers in humid environments.
yard Outdoor plants wb_sunny Shade / Half-shade pets Pet Friendly
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Plant Details

Common Name Cornish Rock Fern
Family Polypodiaceae
Genus Polypodium
Species Vulgare
Variety cornubiense
Origin United Kingdom
Blooming Ferns reproduce via spores, not flowers. Spore production occurs in summer.
Leaf Color Deep emerald green
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

terrain
Soil

Peat-based mix with perlite or orchid bark. Humus-rich and well-drained.

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Watering

Keep soil consistently moist but not waterlogged. Mist foliage frequently for humidity.

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Sunlight & Care

Prefers deep shade to partial shade. Avoid direct midday sun which scorches fronds.

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Fertilization

Diluted liquid fertilizer monthly during growing season (Spring-Summer)

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Pruning

Remove dead or damaged fronds at the base to encourage new growth

Pest Control Aphid Mealybug Scale Insect Snail

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

eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
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Growing Parameters

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Temperature
50° – 82°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 90%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
500 – 3000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
50 – 200
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
30% – 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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