Cryptocoryne wendtii
Goes through a famous 'crypt melt' when first planted or moved, leaves dissolve, the plant regrows from the roots stronger than before. Don't pull it out.
Cryptocoryne Wendtii (Cryptocoryne wendtii) is a rosette / root feeder aquatic plant for the midground of a planted tank. It reaches 15–25 cm under good conditions and grows at a slow to medium rate. Light: low to medium. CO₂: none to optional. Target 22–28 °C, pH 6.0–8.0, and 2–15 dGH. Substrate: Nutrient-rich substrate + root tabs. Propagate via runners.
Care at a glance
Goes through a famous 'crypt melt' when first planted or moved, leaves dissolve, the plant regrows from the roots stronger than before. Don't pull it out.
By Mike ElmiraUpdated 2 min read
Part of our complete guide to the planted aquarium.
The parameters that decide whether cryptocoryne wendtii fits in your tank.
Araceae
Rosette / Root Feeder
Midground
Nutrient-rich substrate + root tabs
Runners
Shaded lowland forest streams of Sri Lanka
Sri Lanka
Tank-mate safety and the species this one is documented to thrive (or fail) alongside.
Hard-won lessons from the tank.
Plant individual specimens 8–10 cm apart in a row at the midground border — they'll fill in over 3 months. Don't bury the crown; cover only the roots. Crypts dislike major changes; once planted, leave them alone for 6 months. They'll reward patience.
What can go wrong and how to spot it.
Failure modes, in order of how dramatic the fix is.
Pinholes: potassium. Pale leaves: iron + nitrogen. 'Crypt melt' is not a deficiency — it's a response to sudden change (parameter shift, transplanting, lighting change). Leaves dissolve over days; the rhizome is fine. New leaves emerge within 2–6 weeks, often stronger and better-coloured.
Resistant to algae when established because of antibacterial leaf compounds. Old leaves do accumulate spot algae.
The practical routine, read top to bottom.
Root feeder — tabs every 4 months. Iron and potassium for colour. Less demanding than swords.
Trim damaged outer leaves at the base. Don't trim during a melt — the rhizome is regenerating.
Where it comes from, how it behaves, and the variants you'll see at retail.
Where it lived before it came home.
Streams and shaded forest pools in Sri Lanka. Often grows on shaded riverbanks emersed during dry months.
Emersed leaves are stiffer and brighter; produces a distinctive spadix flower partially submerged in mud, which is taxonomically the way to differentiate Crypt species.
Submerged flowering is rare; emersed flowering is common in low-water dry seasons.
The named cultivars and the lookalikes worth flagging.
'Green', 'Bronze', 'Tropica' (compact, brown), 'Mi Oya' (taller bronze), 'Red' (deep red), 'Florida Sunset' (variegated pink/cream — premium). All same care.
C. wendtii is extremely polymorphic — leaf shape varies more between conditions than between cultivars. Often confused with C. walkeri and C. beckettii.
Direct answers to the questions search engines and AI assistants surface most often about this species.
CO₂ requirement: none to optional. Light requirement: low to medium. Under low-tech conditions the plant grows at a slow to medium rate.
Cryptocoryne Wendtii (Cryptocoryne wendtii) needs low to medium light. Run a photoperiod of 6–8 hours; longer photoperiods invite algae unless CO₂ and dosing are dialled in.
Position: midground. Substrate: Nutrient-rich substrate + root tabs It typically reaches 15–25 cm.
Propagation method: Runners. Cryptocoryne Wendtii is a rosette / root feeder plant.
Target 22–28 °C, pH 6.0–8.0, and 2–15 dGH. Flow tolerance: low to medium.
Difficulty: 2/5. Forgiving, beginner-friendly once the tank is cycled.
A planted tank is a system. Pair this plant with one entry from each other pillar to plan the whole scape.
