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



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Begonia masoniana 'Mountain' takes the familiar Iron Cross pattern and scales it up, producing larger, heavily textured leaves with deep red margins around the dark central marking. The bigger blades make it more dramatic than smaller forms, but it still grows from rhizomes and stays low enough to suit shelves or wide, shallow containers rather than tall floor pots.
Bright filtered light supports the gloss and colour, while a loose, organic, well-drained substrate keeps the rhizomes active without turning them soggy. High humidity helps preserve the edges and overall leaf finish, especially while new growth is expanding. It is best treated as a foliage specimen, not a fast filler plant: stable warmth, even moisture, and a little patience are what produce the oversized leaves that distinguish it from tighter, more compact selections in the same group.
Light
Bright indirect • approx. 10,000–20,000 lux
Water
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
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.