Cryptocoryne Willisii (Cryptocoryne willisii) Care Guide
A compact low-growing Cryptocoryne with narrow green leaves that forms dense clusters over time through prolific runner production.
Compiled by Aquairi from published sources · Published · Updated
Overview
Cryptocoryne willisii is an aquatic plant in the family Araceae. A compact low-growing Cryptocoryne with narrow green leaves that forms dense clusters over time through prolific runner production. An excellent choice for the foreground or low midground, providing a natural textured look with minimal effort once established.
Taxonomy
- Family: Araceae
- Genus: Cryptocoryne
- Scientific name: Cryptocoryne willisii
- Other names: Willis's Crypt
Habitat
Endemic to Sri Lanka, where it grows in shallow, shaded streams on lateritic soils. Forms compact creeping mats through prolific runner production in stable, low-flow conditions.
Growth requirements
- Light: low (≈30-50 PAR at substrate)
- CO2: optional (CO2 improves growth and coloration)
- Temperature: 22-28 °C
- pH: 6-7.5
- GH: 2-12 °dGH
- Substrate: nutrient-rich aquasoil or fertilised gravel
- Nutrient demand: low
- Growth rate: slow
- Difficulty: beginner
Placement
- Recommended placement: foreground
- Maximum height: 10 cm
Propagation
In cultivation the plant is propagated by runners (daughter plants on horizontal stolons).
Propagating Cryptocoryne willisii (Willis's Crypt)
Overview
Cryptocoryne willisii is a compact, low-growing crypt in the family Araceae, prized as a foreground or low midground plant. Each plant is a rosette growing from a rhizome; Tropica lists it at 7-20 cm tall with each rosette 7-15 cm wide. Over time it forms dense clusters as it produces plenty of runners that knit into a compact group.
Like other Cryptocoryne, submerged plants reproduce vegetatively, so propagation is simply a matter of harvesting the daughter rosettes the plant offers up on its own.
Propagation Method (Runners / Division)
Runners are the primary route: the rhizome throws horizontal stolons that surface nearby and form new rosettes, so the plant naturally spreads into a carpet. Rhizome division is the secondary route, splitting a mature clump into sections that each carry roots and a growing point.
Step-by-Step
- Allow the parent to establish; expect little for the first month, then prolific runners.
- Identify daughter rosettes that have grown their own roots along the runners.
- Cut the connecting runner with clean scissors, or lift and divide a dense clump.
- Replant daughters in nutrient-rich substrate with the crown above the surface.
- Set replants a few centimetres apart so they merge into a continuous foreground.
Conditions for Healthy Growth
Use a nutrient-rich substrate to feed the roots. Low light is enough and CO2 is optional. As with most crypts, expect a slow first month while it acclimatises before it begins producing runners in earnest.
Maintenance
Maintenance is minimal: trim away old or yellowing leaves at the base and thin the carpet periodically by removing surplus daughter rosettes so the patch stays dense but not overcrowded. Replenish root tabs in inert substrate.
Common Challenges
Leave the rhizome in place; it regrows submersed leaves over roughly a month. Stable parameters and a fed substrate speed the rebound, after which willisii resumes its steady runner production.