Thelypteris palustris

Marsh Fern

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Rhizomatous perennial fern native to wetlands and damp woodlands. Pinnate fronds form dense clumps, requiring consistent moisture and shade.
yard Outdoor plants wb_sunny Shade / Half-shade pets Pet Friendly
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Plant Details

Common Name Marsh Fern
Family Thelypteridaceae
Genus Thelypteris
Species Palustris
Origin North America / Eurasia
Blooming Non-flowering, sporulation in summer
Leaf Color Emerald green to yellow-green
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

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Soil

Rich, organic soil with high peat content or bog substrate

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Watering

Keep soil consistently moist; never allow to dry out. High humidity required.

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Sunlight & Care

Partial shade to full sun (only if soil remains wet)

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Fertilization

Apply diluted liquid fertilizer monthly during growing season (Spring/Summer)

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Pruning

Remove dead or damaged fronds in late winter before new growth

Pest Control Aphid Fern Scale Slug 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° – 79°
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)
300 – 4000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
500 – 2800
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
40% – 85%
% 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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Common Problems

Something wrong with your Thelypteris palustris? Select a symptom to diagnose and fix the issue.

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