Cyathea exilis Plant Care
Cyathea exilis Holttum
Updated · Sources · How we source care data
Alsophila exilis, synonym Cyathea exilis, is a species of tree fern endemic to the Cape York Peninsula in Queensland, Australia, where it grows in vine forest on a substrate of sandstone. It is a rare plant known only from one location, specifically by a stream in Mann Creek in the William Thompson Range.
Every 7–10 days
Filtered sunlight or partial shade
60–75°F
60–80%
At a glance
How do you care for Cyathea exilis?
Water Cyathea exilis every 7–10 days, letting the top layer of soil dry out between waterings, and give it filtered sunlight or partial shade. It prefers temperatures of 60–75°F (16–24°C) and 60–80% humidity. Fertilize it every 6 months during the growing season.
Where Is the Cyathea exilis Native To?
What Is the Cyathea exilis?
Cyathea exilis (Cyathea exilis) belongs to the Cyatheaceae family within the Cyathea genus. Cyathea exilis is native to the Cape York Peninsula in Queensland, Australia.
Cyathea exilis displays a large, tree-like fern growth habit, reaching up to 10 ft tall with a spread of approximately 6 ft. Cyathea exilis produces non-flowering.
Leaf size: approximately 36 inches.
How Often Should You Water a Cyathea exilis?
Cyathea exilis requires watering every 7–10 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 7–10 days
Let soil partially dry between waterings
What Light Does the Cyathea exilis Need?
Cyathea exilis thrives in filtered sunlight or partial shade. Avoid placing Cyathea exilis in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Filtered sunlight or partial shade
What Temperature and Humidity Does the Cyathea exilis Prefer?
Cyathea exilis grows best at temperatures of 60–75°F. Cyathea exilis prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
60–80%
What Soil Mix Works Best for a Cyathea exilis?
Well-draining, rich organic soil with high moisture retention. Good drainage is essential for Cyathea exilis to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Cyathea exilis?
Feed Cyathea exilis every 6 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 6 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 Cyathea exilis?
Repot every 2-3 years in 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 Cyathea exilis?
Cyathea exilis can be propagated through spores, division of rhizomes. Similar propagation techniques also apply to australian tree fern plant care, which shares the same genus.
Is the Cyathea exilis Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Cyathea exilis, 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 Cyathea exilis?
Cyathea exilis is susceptible to aphids, scale insects, 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.
What USDA Hardiness Zone Does the Cyathea exilis Need?
Cyathea exilis grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Cyathea exilis is native to the Cape York Peninsula in Queensland, Australia. In cooler regions, grow Cyathea exilis as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Cyathea exilis 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 Cyathea genus — compare its care with other Cyathea species on PlantoScan.
Cyathea is part of the Cyatheaceae plant family — browse all Cyatheaceae genera and species.
Cyathea exilis produces blooms — browse other flowering plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Cyathea exilis Holttum, family Cyatheaceae (first published in Kew Bull. 41(3): 532 (1986)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Cyathea exilis, 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.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- 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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