Propagating Cryptocoryne wendtii 'Brown'

How to propagate Cryptocoryne wendtii 'Brown' from runners and rhizome division, manage crypt melt, and grow tidy bronze midground clumps in low-tech tanks.

Overview

Cryptocoryne wendtii (family Araceae) is native to Sri Lanka and is one of the most robust, easy-to-grow Cryptocoryne species. The 'Brown' form keeps the bronze, slightly bullate leaves that make it a tidy bushy midground plant. Like all crypts it grows as a rosette from a central rhizome and is a root feeder, not a stem plant — so it is propagated from runners and rhizome division, never by topping cuttings.

Propagation Method (Runners / Division)

There are two reliable methods. The main one is runners (stolons): adult plants send daughter plants on runners under the substrate, all attached to the mother plant. The second is rhizome division: lift an older clump and cut the rhizome so each piece keeps roots and leaves.

• Runners (stolons) — daughter plantlets emerge from runners running through the substrate
• Rhizome division — split a mature clump along a natural crease between rosettes

Step-by-Step

1. Let the mother plant establish and produce several daughter plantlets on its runners.
2. Wait until a daughter plant reaches medium size (leaves about 5–6 cm); plantlets grow faster while still attached to the mother.
3. Cut the runner to separate the daughter, keeping its roots intact.
4. For division, lift an older clump, find a natural crease between rosettes, and snip with sharp scissors, then gently untangle the roots.
5. Trim long roots to a few centimetres and replant each piece in nutrient-rich substrate, leaving the crown above the soil.

Conditions for Healthy Growth

'Brown' thrives in low light and does not require high light or CO2, which makes it ideal for low-tech, shaded midground positions. As a root feeder it benefits from a nutrient-rich substrate or root tabs. It grows slowly but steadily at 22–28 °C and forms a dense clump over time.

Maintenance

Maintenance is minimal: thin out the clump periodically by lifting and dividing crowded rhizomes, and replenish root tabs so daughter plants keep coming. Replanted runners can each send out a couple of new runners a month given adequate light and nutrients.

Common Challenges

Avoid frequent moving and large swings in parameters, since transplanting newly divided pieces can trigger melt. Keep the rhizome and roots undisturbed, maintain stable water, and the bronze clump will regrow on its own.