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



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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.
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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, building a dense plant with strong surface detail.
Grow it in bright filtered light, warm temperatures and an airy substrate that stays lightly moist around the rhizome while draining quickly after watering. A shallow pot suits the plant better than a deep container, because most growth sits close to the surface. Keep water off the textured leaves, remove ageing foliage at the base and refresh compacted substrate before the rhizome loses airflow. The result is a bold, tactile Begonia for close-range display.
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 begonia
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.
Move outside once nights stay above
15°C
Bring under cover below
13°C
Best outdoors in
Warm summer patio, Sheltered urban spot