Hoya wallichii

A lowland Hoya from Peninsular Malaysia, Singapore and Borneo. It was first described as Physostelma wallichii in 1834, and a second subspecies, subsp. tenebrosa, was named in 2021. It comes from very wet, hot, aseasonal rainforest, so it wants warmth and humidity all year and no dry rest.

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 periodClimber

Where it grows wild

A climbing, twining vine of lowland rainforest that roots onto trees. Old specimens come from Singapore (collected in 1822) and from Ulu Gombak in Selangor, at about 300 m. Published habitat notes are scarce, so the microhabitat is inferred from the genus and the lowland localities.

The one specimen with an elevation is from about 1000 ft (300 m) at Ulu Gombak, Selangor. The others are lowland, such as Singapore.

Peninsular MalaysiaSingaporeBorneo

🔒 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.