Hoya rotundiflora
Hoya rotundiflora
Also called Rotundiflora, Square-leaf hoya and Hoya sp. Square Leaf
Houseplant · HoyasTHE LEAVES ARE VISIBLY SQUARE, with four corners and a notch in the tip — there is nothing else like it in the genus. The flowers smell strongly of lemon at night and of nothing at all in the day.
Care at a glance
- Ease
- Medium
- Water
- Every 9 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
- 0.8 m tall · 0.5 m across
- Lifecycle
- Climber
- Origin
- Thailand
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
- Rounded leaves on a young plant. The four corners develop as it matures — a seedling or a fresh cutting looks like any other hoya.Leaves not square · disorder
- Flowers that smell of nothing. They release at NIGHT — go back after dark and the lemon is unmistakable.No scent · disorder