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Species library › Cyrtosperma › Cyrtosperma johnstonii
Aroids Partly documented

Cyrtosperma johnstonii

A Solomon Islands Cyrtosperma grown for its arrow-shaped, often red-veined leaves on spiny petioles. It is a hot-house plant for permanently wet soil and filtered light.

Cyrtosperma johnstonii
Photo: CC BY-SA 3.0, via Wikimedia Commons
At home, aim for
Day Warm-growingTargets in Plantistry
Night Close to the dayTargets in Plantistry
Humidity Humid airBand in Plantistry
Light Dappled lightDLI and PPFD in Plantistry
No rest periodGrows in the ground

Where it grows wild

Swampy ground and wet forest in the Solomon Islands; ecology generalised from the genus.

Records from near sea level to about 700 m.

Solomon Is.

🔒 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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Cyrtosperma merkusii Cyrtosperma beccarianum Cyrtosperma cuspidispathum Cyrtosperma giganteum Cyrtosperma hambalii Cyrtosperma macrotum

Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.