Photo: Mark PollockCC BY 4.0via iNaturalistresized / cropped
Miniature Sword Fern Plant Care
Gymnosteris parvula A.Heller
Updated · Sources · How we source care data
Gymnosteris parvula is a charming fern with small, lance-shaped fronds that are a vibrant shade of green. Native to tropical regions, this plant thrives in moist, humid environments and is beloved by plant enthusiasts for its compact size and easy-care nature.
Every 5–7 days
Bright indirect to partial sun
65–75°F
60–80%
At a glance
How do you care for Miniature Sword Fern?
Water Miniature Sword Fern every 5–7 days, letting the top layer of soil dry out between waterings, and give it bright indirect to partial sun. It prefers temperatures of 65–75°F (18–24°C) and 60–80% humidity. Fertilize it every 2 months during the growing season.
Where Is the Miniature Sword Fern Native To?
What Is the Miniature Sword Fern?
Miniature Sword Fern (Gymnosteris parvula) belongs to the Polemoniaceae family within the Gymnosteris genus. Miniature Sword Fern is native to the western United States from California to Montana. Miniature Sword Fern is also known as Dwarf Sword Fern.
Miniature Sword Fern displays a low rosette, clumping growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Miniature Sword Fern produces small bell-shaped flowers in shades of blue, pink, or white.
How Often Should You Water a Miniature Sword Fern?
Gymnosteris parvula requires watering every 5–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 5–7 days
Let soil partially dry between waterings
What Light Does the Miniature Sword Fern Need?
Miniature Sword Fern thrives in bright indirect to partial sun. Avoid placing Miniature Sword Fern in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect to partial sun
What Temperature and Humidity Does the Miniature Sword Fern Prefer?
Gymnosteris parvula grows best at temperatures of 65–75°F. Miniature Sword Fern prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
65–75°F
Humidity
60–80%
What Soil Mix Works Best for a Miniature Sword Fern?
Well-draining sandy loam with added organic matter. Good drainage is essential for Miniature Sword Fern to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Miniature Sword Fern?
Feed Miniature Sword Fern every 2 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 2 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Miniature Sword Fern?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Miniature Sword Fern?
Miniature Sword Fern can be propagated through seeds, division of offsets.
Is the Miniature Sword Fern Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Miniature Sword Fern, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Miniature Sword Fern?
Miniature Sword Fern is susceptible to aphids, spider mites, mealybugs. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
Keep exploring plants
Miniature Sword Fern is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Gymnosteris genus — compare its care with other Gymnosteris species on PlantoScan.
Gymnosteris is part of the Polemoniaceae plant family — browse all Polemoniaceae genera and species.
Miniature Sword Fern thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Gymnosteris parvula A.Heller, family Polemoniaceae (first published in Muhlenbergia 1: 3 (1900)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Miniature Sword Fern, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Mark Pollock, CC BY 4.0, iNaturalist — original.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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