Propagating Java Fern 'Petite' (Microsorum pteropus 'Petite')

How to multiply the nano cultivar Java Fern 'Petite' by rhizome division and adventitious plantlets, then tie or glue the pieces to hardscape without burying the rhizome.

Overview

Java fern (Microsorum pteropus, also classified as Leptochilus pteropus) is an aquatic to semi-aquatic fern that naturally grows attached to riparian roots and rocks rather than rooting in the substrate. It is an epiphyte: the plant has a horizontal rhizome from which roots develop and anchor it to hardscape. 'Petite' is a compact nano selection whose small leaves stay short, but it propagates exactly like the standard species.

Because Java fern is among the most popular hobby plants for its ease of care, it tolerates a wide range of conditions and is forgiving for beginners attempting their first propagation.

Propagation Method (Rhizome Division & Plantlets)

There are two reliable asexual routes. The first is rhizome division: you cut the horizontal rhizome into sections, each carrying roots and at least a few leaves. The second is adventitious plantlets, which the plant readily produces from its leaf tips and margins; these small daughter ferns develop roots of their own and can establish on surrounding objects before the mother leaf deteriorates.

Step-by-Step

1. Remove the mother plant from its wood or rock and rinse off debris.
2. For division: cut the rhizome into sections with clean scissors, keeping roots and a few leaves on each piece.
3. For plantlets: gently detach daughter ferns from leaf tips and margins once they have their own small roots.
4. Tie each section to driftwood or rock with thread, or fix the roots with a small line of super glue gel, pressing for about 30 seconds until set.
5. Leave the rhizome fully exposed on top of the hardscape and return it to the tank.

Conditions for Healthy Growth

Java fern grows well in tap water under dim or bright light, with or without gravel, and does not need CO2. It is a slow grower and notably snail resistant, growing better even with higher fish loads. Keep the new divisions in stable water and give them time — visible new growth on epiphytic ferns is gradual.

Maintenance

Once the roots wrap around the hardscape the attachment becomes permanent, so any thread can be removed. Trim away old or melting leaves; if a parent leaf fails, the small fern can float off on its own and start anew elsewhere in the tank.

Common Challenges

The most common mistake is burying the rhizome, which causes rot. Slow establishment is normal for this low-energy fern, and impatience often leads hobbyists to disturb fresh divisions too early. Let plantlets root fully before separating them so they survive the move.