Light
Bright indirect • approx. 10,000–20,000 lux





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Quick Care Guide
Light
Bright indirect • approx. 10,000–20,000 lux
Watering
Water when ~20–35% dry
Substrate
Airy • Fast-draining • Mineral-leaning • Fine-medium
Temperature
Ideal: 18–28 °C • Avoid below: 10 °C
Humidity
Humid 60–80 % +
Growth habit
Upright clumping terrestrial fern.
Support
not needed
Growth speed
Average
Max size indoors
Max. height: 15 cm • Max. spread: 20 cm
Toxicity & safety
Pet safety unconfirmed
Origin & habitat
Native to Mauritius, Réunion
Outdoor growing
Outside from 12 °C · sheltered from wind
These care values are quick reference points for indoor growing. Use them as a guide, then adjust for pot size, substrate, temperature and how quickly the substrate dries.
For more detail, read the full product description or visit our Plant Care Guides.
Actiniopteris australis is a miniature fern with a compact crown and finely divided green fronds. The fronds rise from a small rhizome and spread into narrow, radiating segments, giving the plant a precise outline when viewed from above.
This fern stays small enough for shallow pots, terrariums, vitrines or warm plant cabinets. The rhizome sits close to the substrate surface, while the finely cut fronds form a tight, radiating crown.
Actiniopteris australis belongs to the Pteridaceae, the brake fern family. Its native range is Mauritius and Réunion. The genus Actiniopteris includes small terrestrial and lithophytic ferns associated with airy, well-drained microhabitats. Indoors, bright filtered light keeps the fronds compact, while a lightly moist, airy mix keeps the shallow rhizome from softening.
The plant grows from a compact point close to the substrate surface. New fronds rise in a tuft and divide into slender segments, so the plant forms a small fan-like crown. Because the plant stays compact, a low open container keeps the crown uncovered.
In pots, Actiniopteris australis does best with light, steady moisture and an airy mix around the roots. A shallow pot or stable terrarium matches the small root system and keeps the rhizome close to the surface.
Keep surrounding planting low so the crown is not covered and the divided fronds have room to spread from the centre.
In terrariums and vitrines, place the plant where condensation drips away from the growing point. The air can stay humid, but water should not drip into the growing point.
Actiniopteris australis is grown as an ornamental fern. Keep it away from pets and children that may nibble plants, and wash hands after handling old fronds, substrate, or repotting material. The crown and rhizome are delicate, so handle the plant gently during cleaning or repotting.
The botanical name is Actiniopteris australis (L.f.) Link. The plant belongs to the Pteridaceae. The genus name Actiniopteris comes from Greek roots meaning “ray” and “fern”, referring to the radiating frond structure. The species epithet australis means “southern”.
Keep Actiniopteris australis warm and lightly moist, with space around the crown so new fronds are not trapped by wet planting material.
Plant names, growth habits, natural habitats and indoor care guidance are checked against trusted botanical, habitat and horticultural references before publication.View our plant care resources and references.