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Species library › Cryptocoryne › Cryptocoryne thwaitesii
Aroids Little published: much of this is inferred from related species

Cryptocoryne thwaitesii

A rare, slow Sri Lankan Cryptocoryne with stiff, toothed leaves that grows in shaded, clear streams of the wet-zone rainforest. It is regarded as one of the hardest Cryptocoryne to keep, needing soft, cool-ish, clean water and very stable conditions.

At home, aim for
Day Warm-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Very humid airBand in Plantistry
Light ShadeDLI and PPFD in Plantistry
No rest periodAquatic

Where it grows wild

Rheophytic, rooted among sand, gravel and rocks in flowing forest streams in deep shade, submerged in the wet season and partly emersed when water drops. Habitat notes are from aquarium and genus knowledge, not a source opened here.

Lowland to low hill streams; the single climate point is at about 240 m.

Sri Lanka

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates
✓ Humidity band, and how to hold it
✓ Light as DLI and PPFD for a grow light
✓ Wet and dry seasons, and whether to rest it
✓ Substrate and airflow
✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.