Light
Bright indirect • approx. 10,000–20,000 lux





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Hoya callistophylla IML 3576 'Black Cat' is a collector clone known for broad leathery leaves with especially dark recessed venation and strong contrast across the blade. The plant climbs or trails on semi-woody vines and, with time, can also produce umbels of pale yellow to greenish flowers with a gentle sweet fragrance.
Bright indirect light helps the venation stay pronounced, while watering should wait until the upper 2–3 cm of substrate have dried. A loose mix of bark, perlite, coir, and a little humus keeps the roots airy, and warmth around 18–28 °C with moderate to higher humidity supports stronger growth. It benefits from being slightly root-bound when mature and should not have old peduncles cut away, because flowers return from those spurs.
This is a strong choice for growers building a Hoya collection around bold veining and foliage drama.
Quick Care Guide
Light
Bright indirect • approx. 10,000–20,000 lux
Watering
Water when ~60–80% dry
Substrate
Airy + fast-draining • Light moisture buffer • Bark-based • Medium-chunky
Temperature
Ideal: 16–24 °C • Avoid below: 10 °C
Humidity
Moist 50–60 %
Growth habit
Climbing or trailing epiphytic perennial vine.
Support
optional
Growth speed
Average
Max size indoors
Max. trail length: 150 cm • Max. spread: 60 cm
Toxicity & safety
Non-toxic & Pet Friendly
Origin & habitat
Cultivar of Hoya callistophylla
These care values are practical reference points for indoor growing. Use them as a starting point, then adjust for your room, pot size, substrate, temperature and how quickly the plant dries.
For more context, read the full product description or visit our Plant Care Guides.
Move outside once nights stay above
16°C
Bring under cover below
16°C
Best outdoors in
Warm summer patio, Covered terrace
Plant names, growth habits, natural habitats and indoor care guidance are checked against trusted botanical, habitat and horticultural references before publication.View our plant care resources and references.