Dragon tail plant vs Sweetheart hoya
Epipremnum pinnatum · Hoya kerrii
Pet safety: Sweetheart hoya is listed non-toxic to cats and dogs; Dragon tail plant is toxic (insoluble calcium oxalates). If the two are sold under the same name, a mislabelled plant is a genuine risk in a house with animals.
Why these two get mixed up
Sweetheart hoya is recorded here as a pet-safe alternative to Dragon tail plant, so the question is usually whether the swap is actually a fair one.
| Dragon tail plant | Sweetheart hoya | |
|---|---|---|
| Scientific name | Epipremnum pinnatum | Hoya kerrii |
| Family | Araceae | Apocynaceae |
| Light floor | Low | Medium |
| Water | 7–12 days | 12–21 days |
| Humidity floor | 45% | 40% |
| Mature height | 24–144 in | 6–96 in |
| Habit | climbing | climbing |
| Growth rate | fast | slow |
| Difficulty | Easy | Easy |
| Toxic to pets | Yes | No |
| Typical price | $15–50 | $15–50 |
Highlighted cells are where the two actually differ. Everything else they share.
The differences that matter
Pet safety
This is the difference that matters most. Sweetheart hoya is listed non-toxic to cats and dogs; Dragon tail plant is toxic (insoluble calcium oxalates). If the two are sold under the same name, a mislabelled plant is a genuine risk in a house with animals.
Mature size
Dragon tail plant reaches about 144 inches; Sweetheart hoya tops out near 96. Buying the wrong one for a shelf means rehoming it in a year.
Light
Dragon tail plant tolerates low light; Sweetheart hoya needs medium as a floor. Put the second in the first's spot and it stretches and declines.
Watering
Dragon tail plant wants water every 7–12 days, Sweetheart hoya every 12–21. On one shared watering schedule, one of them drowns.
Not even related
Dragon tail plant is Araceae, Sweetheart hoya is Apocynaceae. They share a shop label and nothing else — different families, different continents, different care.
Which should you buy?
- With a cat or dog in the house, take Sweetheart hoya. The other is toxic, and if the shop label is wrong you will not know which you have brought home.
- In a dim room, take Dragon tail plant.
- If you forget to water, take Sweetheart hoya, which goes 16 days between drinks.
- If it is your first plant, take Dragon tail plant, at 1 of 5.
- For a small shelf, take Sweetheart hoya, which stops around 96 inches.
Full entries
Dragon tail plant — care fields with sources, toxicity with every authority consulted, propagation and diagnosis. Sweetheart hoya — the same.
Sources
- This database's own care records for Epipremnum pinnatum and Hoya kerrii — every figure compared above.
- Royal Botanic Gardens Kew, Plants of the World Online — accepted names and families for Epipremnum pinnatum and Hoya kerrii
- ASPCA Animal Poison Control — toxicity classification for both, cited on each species entry
- Photographs: Wikimedia Commons, individually credited and licensed above
Compiled and edited by Tony Valcarcel · 2026-09-12
Every comparison above is drawn from a recorded field. Where the honest
distinguisher is visual we show both photographs rather than describing a leaf
we have no field for. How this is sourced.