Species · genus Hoya · Apocynaceae

Hoya

Hoya pubicalyx Merr.

Also known as: Wax Plant · Wax Flower · Porcelain Flower

Growth habit

climber

Native range

Philippines

Reference · H. pubicalyx

Cultivars of H. pubicalyx

The named forms growers keep — each with its own page, each honest about how much we know.

No named cultivars catalogued under H. pubicalyx yet. When growers document a stable, named form, it earns its own page here.

Guide

The species-level account. Cultivar pages build on this and say where they differ.

Hoya pubicalyx is a climbing vine from the Philippines that grows as an epiphyte on host trees, so its semi-succulent leaves store water and its roots want fast-draining, airy mix that never sits wet. Give it bright indirect light, and let the top inch or two of mix dry before watering again. Water only when the mix is dry to a depth of about two inches, hedging toward the drier end to avoid root rot.

Care recipe

The species record — the baseline every cultivar inherits unless it says otherwise.

Care notes are early — not yet verified

Light: ai:claude-opus-4-8
Water: ai:claude-opus-4-8 (range 7-14d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Bright, indirect

Water

≈ every 14 days

Humidity

Medium

Temperature

15–29 °C

Soil mix

Chunky, free-draining epiphyte or orchid-style mix

Propagation

Stem cuttings with a node, rooted in water or mix

Fertilizing

Dilute balanced feed monthly in spring and summer

Growth rate

Fast

Flowering

Prolific fragrant flower clusters; leave old spurs intact

ToxicityAuthoritative · species

Toxic to cats & dogs & humans

Apocynaceae family is associated with cardiac glycosides and milky irritant sap This is where toxicity lives: every cultivar of this species inherits it and none can override it.

Reference images

Every image credited. Licenses link to their deeds.

No reference gallery yet

A few clear photos — habit, a mature leaf, a flower if it blooms — would give this page its eyes.

Add images

Sources: ai:claude-opus-4-8 · ai:claude-opus-4-8 (range 7-14d) · ai:claude-fable-5 · ai:claude-opus-4-8 (family inference)

Kept true by its growers

Every fact here carries its source. Grow Hoya yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — is exactly what keeps this page honest. Contributions are reviewed before anything changes.