Light
Medium indirect • approx. 5,000–10,000 lux






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Leptochilus pteropus subsp. pteropus, better known in aquatics as Java fern, grows from a creeping rhizome that should be attached to wood or stone rather than buried in substrate. Its dark green, lance-shaped fronds arch cleanly through the water and make it a reliable choice for aquariums, paludariums, and other humid aquatic displays where slower, steadier growth is an advantage.
It tolerates low to medium light, a broad range of water hardness, and temperatures around 22–28 °C, with no CO₂ requirement for basic success. Rhizome division and plantlets on mature fronds make propagation easy over time. Because the rhizome must stay exposed to water flow, the plant suits hardscape-based layouts especially well, and it is safe for fish, shrimp, snails, and other common aquarium inhabitants.
Quick Care Guide
Light
Medium indirect • approx. 5,000–10,000 lux
Watering
Water when ~0–10% dry
Substrate
Inert-substrate-friendly • Fast-draining • Mineral-heavy • Medium
Temperature
Ideal: 22–28 °C • Avoid below: 22 °C
Humidity
Humid 60–80 % +
Growth habit
aquatic fern with creeping rhizome
Support
not needed
Growth speed
Slow
Max size indoors
Max. height: 30 cm • Max. spread: 30 cm
Toxicity & safety
Non-toxic & Pet Friendly
Origin & habitat
Tropical Asia to N. Australia; wet tropical habitat
These care values are practical reference points for indoor growing. Use them as a starting point, then adjust for your room, pot size, substrate, temperature and how quickly the plant dries.
For more context, read the full product description or visit our Plant Care Guides.
Do not leave outside below
22°C
This plant is best kept indoors and should not be treated as an outdoor plant in European climates.