Begonia masoniana 'Mountain' – Large-Leaved Iron Cross Begonia with Deep Red Margins


Begonia masoniana 'Mountain' is a bold cultivar of the well-known Iron Cross Begonia, valued for its oversized, textured foliage. Its rhizomatous growth produces pubescent, puckered leaves with characteristic dark central markings. What sets 'Mountain' apart are its large leaf size and dramatic deep red margins, which glow when sunlight passes across the surface, giving the plant a unique glossy sheen. Similar to Begonia masoniana 'Rock', but with larger foliage, 'Mountain' makes an impressive focal point in any collection.
 
● Key Characteristics of Begonia 'Mountain'


Leaf texture: Strongly puckered, pubescent surfaces with tactile appeal
Colouration: Dark iron cross markings with vivid deep red margins
Special effect: Glossy sheen when sunlight hits the foliage
Size indoors: Larger than 'Rock', producing bigger leaves under good care
 
● Botanical Context


Begonia masoniana is native to southern China and northern Vietnam, where it grows in shaded, humid habitats. The species is best known for its textured, patterned foliage. 'Mountain' is a cultivated form bred to emphasise size and colour, giving collectors an option for a more dramatic version of the Iron Cross Begonia.
 
● Care Guide for Begonia masoniana 'Mountain'


Light: Bright, indirect light enhances gloss and colour; avoid strong direct sun
Water: Keep substrate evenly moist, allowing the top layer to dry slightly before rewatering
Humidity: Requires 60%+ humidity to maintain leaf quality
Temperature: Best grown at 18 – 26 °C; avoid drafts and cold spells
Soil: Use a light, airy, organic-rich potting mix with good drainage
Feeding: Apply diluted balanced fertilizer every 3 – 4 weeks during the growing season
 
● Growth Notes and Seasonal Rhythm


'Mountain' grows steadily from rhizomes, producing larger-than-average leaves compared to other Iron Cross cultivars. Indoors it remains evergreen, though growth may slow during cooler months. With stable warmth and humidity, its foliage maintains colour intensity year-round.
 
● Problems You Might Encounter


Brown leaf edges: A sign of low humidity or inconsistent watering
Faded markings: Usually linked to insufficient light; move to a brighter filtered spot
Pests: Occasionally attracts mealybugs or spider mites; treat early with IPM methods
 
● Questions About Begonia 'Mountain'


How big does it grow? Larger than 'Rock', with leaves that can exceed 30 cm under ideal care.
Can it be propagated? Yes, through rhizome cuttings or leaf sections placed in high humidity.
Is it toxic? Like all Begonias, it contains oxalates and should be kept away from pets and children.
 
● Etymology of Begonia


The genus Begonia was named in the 18th century by botanist Charles Plumier in honour of Michel Bégon (1638 – 1710), a French administrator and amateur botanist. 'Mountain' continues this tradition as a modern cultivar bred for scale and dramatic colour.
 
● Why Choose Begonia 'Mountain'?


With oversized textured leaves, deep red margins, and a glossy effect in sunlight, Begonia masoniana 'Mountain' is an exceptional foliage plant. Order today and let its dramatic presence elevate your indoor plant collection.