Microsorum pteropus (Java Fern)
Microsorum pteropus, also known as Java Fern, is a water fern native to Asia. It grows to a height of 15–30 cm and thrives when attached to a root or stone using fishing line until it establishes a firm hold. When planted at the bottom of the tank, the rhizome must not be covered, as this can lead to rot. The plant is easy to propagate by splitting the horizontal rhizome. It is a hardy species that adapts well to various water conditions. Small black spots under the leaves are sporangia, the plant’s reproductive structures, not signs of disease.
Plant Specifications
| Feature | Height: 15–30 cm |
|---|---|
| Origin | Asia |
| Growth Method | Attached to root or stone with fishing line |
| Propagation | By splitting horizontal rhizome |
| Light Requirement | Low to moderate |
| Water Conditions | Adaptable to various conditions |
FAQ
Can Java Fern be planted directly in the substrate?
No, it should not be planted directly in the substrate. The rhizome must remain exposed to avoid rotting.
What do the black spots on the leaves mean?
The black spots are sporangia, which are natural reproductive structures. They are not a sign of disease.
How do I propagate a Java Fern?
Split the horizontal rhizome and replant the sections in a suitable growing medium or attach them to a root or stone.
Steven North –
Grew my Java Fern in a freshwater tank and it has been thriving for months. The plant stays healthy even in low light. I attached it to a rock with fishing line and it has firmly rooted. The black spots on the leaves are normal and not a concern.
John Young –
Easy to grow and very hardy. I split the rhizome last month and now have two new plants. It doesn’t need much light and stays green throughout the week.
Leonard Graham –
Perfect for beginners. I was worried about rotting the rhizome, but following the instructions exactly helped. The plant looks natural and adds a nice green texture to the tank.