Why Plants Die
Theme

Pink Silver

Hoya pubicalyx, Apocynaceae

Sources last read 14 September 2026.

Not yet rated How forgiving it is has not been judged here yet.

Also called Porcelain Flower, Silver Pink Vine and Wax Plant.

Pink Silver (Hoya pubicalyx), the whole plant.
Kor!An (Корзун Андрей), CC BY-SA 3.0 · Wikimedia Commons

Toxicity is partly unassessed

  • Not assessed for cats. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
  • Not assessed for dogs. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
  • Not assessed for people. RHS publishes no harm statement for this plant. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.

What the sources say about its care

Light
Full sun
RHS · read 13 September 2026
Water
Well-drained
RHS · read 13 September 2026
Humidity

No source read publishes a humidity figure for any plant on this site. What follows is general guidance for foliage plants.

Most foliage plants prefer more humidity than a heated room gives; succulents are named as an exception
Penn State Extension · read 13 September 2026
Temperature

How cold this tolerates, not what it prefers. No source read for this site publishes a preferred range for a plant indoors.

H2 — 1–5°C 1–5 °C
RHS · read 13 September 2026
Soil
Loam, Sand; pH Acid or Alkaline or Neutral
RHS · read 13 September 2026
Toxic to cats
Not on the ASPCA list. That is not a finding of safety.
ASPCA · read 13 September 2026
Toxic to dogs
Not on the ASPCA list. That is not a finding of safety.
ASPCA · read 13 September 2026
Harmful to people
No statement of harm to people is published for this plant; that absence is not evidence it is safe.
RHS · read 13 September 2026

Routine care

Watering
Water with filtered water or rainwater. In the growing season water often, letting the potting medium dry between waterings.
NC State Extension · read 13 September 2026
Give bright filtered light and moderate to fairly high humidity; water generously in the growing season and keep just moist over winter.
RHS · read 13 September 2026
Repotting
Tightly confined roots do not bother this plant, so it seldom needs a new pot.
NC State Extension · read 13 September 2026
Propagation
Stem cuttings
NC State Extension · read 13 September 2026
Increase by layering or from semi-hardwood cuttings.
RHS · read 13 September 2026
Pests and diseases
Can be troubled by aphids.
NC State Extension · read 13 September 2026
Can be troubled by scale insects, glasshouse whitefly and mealybugs. Diseases: usually none.
RHS · read 13 September 2026

Move something and watch

Loading the simulator. It needs JavaScript; the care table above does not.

About the plant

Hoya pubicalyx is a species of flowering plant in the genus Hoya native to the Philippines.

From Wikipedia, CC BY-SA 4.0 · read 13 September 2026

Native range
Philippines (Luzon)
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Philippines
NC State Extension · read 13 September 2026
Philippines
RHS · read 13 September 2026
Climate
wet tropical
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Growth form
climber
World Checklist of Vascular Plants, June 2026 release, CC BY.
Kew WCVP · read 13 September 2026
Annual, Succulent, Vine; habit climbing, creeping
NC State Extension · read 13 September 2026
Climbing, Trailing (evergreen)
RHS · read 13 September 2026
Size
Height 96–120 in
NC State Extension · read 13 September 2026
Height 2.5-4 metres; spread 1-1.5 metres after 2–5 years
RHS · read 13 September 2026
Flowering
Flowers pink; blooms in spring, summer
NC State Extension · read 13 September 2026
Flowers red in spring and summer; pink in spring and summer
RHS · read 13 September 2026
Uses

What sources record people using this plant for. A traditional or medicinal use listed here is a record of use, not advice to eat it or treat anything with it.

Grown indoors, or outdoors in a sheltered spot.
NC State Extension · read 13 September 2026

Other Hoya

More of the Apocynaceae family

Plants with similar care

Sources

What this does not cover

The figures above are what published sources say, not measurements of the plant in your room. They say nothing about your pot size, your water, the season, or how far from the glass the plant stands, and those decide more than any figure here does.

Humidity has no species figure because no source read for this site publishes one, and the only temperature published for this plant is a cold floor. The simulator fills those gaps with general figures for its kind of plant, marked as general and listed on how we read sources. Where a toxicity row says the plant was not assessed, that is the absence of a finding and not a finding of safety.

If something is already wrong, the diagnosis tool asks about the soil, the window and the watering, which is where the answer usually is.