Propagating Java Fern: Division and Plantlets Guide

Propagate Microsorum pteropus by dividing its rhizome and harvesting adventitious plantlets from leaf tips, then attaching them to wood or rock above the substrate.

Overview

Java fern (Microsorum pteropus, current name Leptochilus pteropus) is a hardy aquatic fern native to Malaysia, Thailand, northeastern India, and South China, named after the island of Java. In nature it grows attached to riparian roots and rocks, behaving as an epiphyte rather than rooting in substrate. It is one of the most forgiving, low-light aquarium plants.

Propagation Method: Division and Plantlets

Java fern reproduces in two complementary ways. You can divide the horizontal rhizome into sections, and the plant also reproduces asexually by forming small adventitious plantlets on its leaf tips and margins. These plantlets develop their own roots and can attach to nearby surfaces or drift to new locations.

Step-by-Step

For division: cut the rhizome into pieces, each keeping at least 3-4 leaves with their roots.
For plantlets: wait until leaf-tip plantlets have roots, then gently detach them from the parent leaf.
Attach each division or plantlet to driftwood or rock by tying the roots from the rhizome with thread, or with a small line of super-glue gel.
Place the mounted plants in the tank with the rhizome resting above the substrate.
Over time the roots grip the hardscape and the plant anchors itself securely.

Conditions for Healthy Growth

Lighting: low light; tolerates varying light and even plain tap water.
Temperature: 20-28 °C.
pH 6-7.5, GH 3-12.
CO2 is not required; grows better with higher fish loads and resists snails well.

Maintenance

Growth is slow, so little trimming is needed. Leave healthy older leaves in place, as they may produce new plantlets. Remove only damaged or algae-covered leaves, and let new plantlets and the creeping rhizome expand the colony naturally over hardscape.