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



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Rugged green leaves, puckered texture and a dark central cross marking shape the Iron Cross character of Begonia masoniana 'Rock'. The low crown spreads gradually from a shallow rhizome, forming a dense plant with strong surface detail. The cross pattern sits within the leaf texture rather than above it.
Use a shallow container, bright filtered light and an airy substrate that stays lightly moist around the rhizome but drains cleanly after watering. Keep water off the textured leaves, remove ageing leaves at the base and refresh compacted substrate before airflow around the rhizome declines.
Quick Care Guide
Light
Bright indirect • approx. 10,000–20,000 lux
Watering
Water when ~25–40% dry
Substrate
Fine but airy • Moisture-buffered • Balanced • Fine
Temperature
Ideal: 18–24 °C • Avoid below: 13 °C
Humidity
Humid 60–80 % +
Growth habit
Rhizomatous clumping herbaceous perennial.
Support
not needed
Growth speed
Average
Max size indoors
Max. height: 50 cm • Max. spread: 50 cm
Toxicity & safety
Toxic
Origin & habitat
Cultivar of Begonia masoniana; species native China to Vietnam
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.
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15°C
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13°C
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Warm summer patio, Sheltered balcony
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.