Propagating Lagenandra keralensis: Rhizome Division and Runners

Multiply this rare Kerala aroid by dividing its thick creeping rhizome and lifting runners. A slow, emersible aroid that melts before regrowing.

Overview

Lagenandra keralensis is a member of the aroid family Araceae, endemic to the Indian subcontinent and rare in cultivation despite growing interest in the aquascaping hobby. Like other Lagenandra, it grows from a thick creeping rhizome and can develop both submersed and emersed leaves, with simple blades ranging from ovate to almost linear. It is a slow, undemanding species, so all propagation here is vegetative — driven by the rhizome rather than by cuttings.

Propagation Method (Rhizome Division)

The thick creeping rhizome is what enables vegetative reproduction through division. As the rhizome creeps it produces new shoots and runners along its length; each established section that carries its own leaves and roots can become an independent plant. Lagenandra differs from the related Cryptocoryne in having involute leaf vernation, but it shares the same crypt-like habit of melting after disturbance and then regrowing.

Step-by-Step

Lift or expose a healthy stretch of the creeping rhizome that bears several leaves and a developed root system.
Identify a runner or branch point where a side shoot has formed its own roots.
Cut the rhizome cleanly between two leaf groups so each division keeps at least a few leaves and its own roots.
Replant each division into a nutrient-rich substrate, keeping the growing tip of the rhizome above the soil.
Expect older leaves to melt; leave the rhizome undisturbed and new emersible foliage will regrow from it.

Conditions for Healthy Growth

Temperature 22-28°C, soft to moderately hard water (GH 2-10) and pH around 6-7.
Low lighting suits it; CO2 is not required for this slow-growing species.
A nutrient-rich substrate supports the root-feeding rhizome.
Stable, mature water reduces melting and speeds recovery.

Maintenance

Once divisions take hold, maintenance is minimal. Because it is very slow-growing there is no trimming schedule — simply remove fully melted or decayed leaves so they do not foul the water, and let the rhizome creep and produce new runners at its own pace before dividing again.