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




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Hoya 'Puom Siam Ruby' is a Thai hybrid grown for thick, strongly veined leaves edged in ruby to wine-red, creating a jewel-toned foliage effect even before the plant ever flowers. Its compact habit makes it easier to place than more sprawling Hoyas, but the leaf texture and dark margins still give it a distinctly collector-grade look on a hoop, trellis, or hanging setup. Mature plants can also produce neat umbels of pale pink-white flowers with red centres, adding another layer of interest without the plant needing to rely on blooms for value.
Bright indirect light, an airy mix, and steady warmth keep the foliage rich and the structure tight, which is exactly where this hybrid looks best and most obviously different from more ordinary Hoyas.
Light
Bright indirect • approx. 10,000–20,000 lux
Water
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
twining epiphytic vine
Support
optional
Growth speed
Average
Max size indoors
Max. trail length: 100 cm • Max. spread: 50 cm
Toxicity & safety
Non-toxic & Pet Friendly
Origin & habitat
Cultivar of Hoya
These metrics are standardised reference points. We compile them by reviewing and cross-checking multiple botanical and horticultural references, then refining them through real-world growing experience. Source links: Plant Care Resources.
Please use the values as guidance. Conditions vary by home, so the same plant can respond differently. For plant-specific context, read the full product description and browse our Plant Care Guides.
Your new plant has just travelled a long way and needs a calm start in its new home. For step-by-step unboxing and first-week care, check our after-delivery care guide. For deeper tips on how your plant settles in over the next weeks, read our houseplant acclimatization guide.