Hoya imperialis
Hoya imperialis
Also called Imperial hoya and Honey plant (imperialis)
Houseplant · HoyasTHE BIGGEST FLOWER OF ANY HOYA — single blooms three inches across, in loose umbels of half a dozen rather than the tight balls the rest make. It is also the biggest plant: it wants a real trellis, not a hoop.
Care at a glance
- Ease
- Hard
- Water
- Every 8 daysSoak, then bone-dry — wait until the soil is dry right through — lift the pot, it tells you.
- Light
- Bright indirect
- Feed
- Every 45 days
- Humidity
- High
- Hardiness
- Tropical — indoors, warm RHS H1A, to 15°C
- Size
- 2 m tall · 1 m across
- Lifecycle
- Climber
- Origin
- Borneo and the Malay peninsula
Is it safe for pets and people?
Its genus has been checked and nothing in it is listed as harmful — but this particular species has not been listed either way.
Nobody has checked this one against a source for us yet, so treat it as unknown rather than safe.
ASPCA does not name this species. It clears THREE distinct Hoya by name — H. carnosa, H. kerrii and H. pubicalyx — and lists none of the genus as toxic, which meets this bank's threshold for a clean bill to cross a genus. `harm.people` stays unknown because Hoya is absent from the RHS harmful list entirely: nobody has looked, which is weaker than a clean bill.
Checked against ASPCA on 2026-09-22.
A guide, not veterinary or medical advice. If a pet or a person has eaten a plant and you are worried, call your vet or doctor now — don’t wait for signs to appear. Spotted a mistake? Tell us.
First signs of trouble
- A big healthy vine and no blooms. This one wants real size and real warmth before it flowers — a trellis rather than a hoop, and patience measured in years.Never flowers · disorder
- No second flush from a spur that bloomed last year. Hoyas reflower from the same short woody peduncle; cutting it off costs every future flush from that point.Flower stalk cut off · disorder