Propagating Red Java Fern (Microsorum pteropus 'Red')

A practical guide to multiplying Red Java Fern through horizontal rhizome division and leaf-tip plantlets, attaching new pieces to wood or rock without burying the rhizome.

Overview

Red Java Fern is a colour form of Microsorum pteropus whose young fronds emerge reddish-brown before maturing to green. It is the same epiphytic fern as the standard species, attaching to surfaces rather than rooting in substrate, and it is propagated vegetatively from its horizontal rhizome.

It is just as undemanding as ordinary Java fern: tolerant of dim or bright light, a wide range of water, and snail resistant. Growth is slow, so expect propagation to take its time.

Propagation Method (Rhizome Division / Plantlets)

There are two vegetative routes. Splitting the horizontal rhizome yields several plants, each section keeping leaves and roots. Alternatively, adventitious plantlets form on the leaf tips and margins of mature foliage and can establish on their own once separated from the mother leaf.

Rhizome division — cut the creeping rhizome into sections with leaves and roots.
Leaf-tip plantlets — let baby ferns develop on old leaves, then detach and reattach.

Step-by-Step

Remove the parent fern from its wood or rock and rinse gently.
Cut the rhizome into sections, each with several leaves and a clump of roots.
For plantlets, wait until the babies on old leaf tips have small roots, then separate them.
Tie or glue each piece to driftwood or stone with the rhizome left fully exposed.
Place it in a shaded, gently flowing spot and let new red fronds appear before moving it.

Conditions for Healthy Growth

Provide low to moderate light, around 20-28 degrees C, pH 6.0-7.8 and a broad hardness range, with no CO2 needed. A reasonable fish load supplies the gentle nutrients its exposed roots prefer; the red tones show best under modest, stable lighting.

Maintenance

Leave attached plants undisturbed so the slow growth is not set back. Once roots grip the hardscape, remove the line or let the glue be overgrown, and snip off old or damaged leaves at the rhizome.

Common Challenges

Rotting rhizome — from burying it; always keep it exposed on hardscape.
Slow regrowth — expected for this slow grower; minimise replanting.
Loose pieces drifting — re-tie or glue them; floating plantlets settle naturally.