Iron Cross Begonia (Begonia masoniana)

Iron Cross Begonia

Begonia masoniana

Its cross-shaped leaf markings look like iron emblems, rugged and striking. Evergreen rhizomatous foliage plant; common name: Iron Cross Begonia.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch the textured leaves
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Watering Allow the top 2–3 cm of soil to dry completely between waterings to prevent rhizome rot
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Temperature Thrives in warm, humid conditions; avoid temperatures below 12°C which can trigger leaf drop
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Characteristics

  • Leaf: Thick, textured dark green leaves with a prominent brown cross-shaped marking at the center; slightly hairy surface
  • Flower: Small, pale pink or white clustered blooms on thin stems rising above foliage
  • Stem: Short, fleshy rhizomes grow horizontally just below the soil surface
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; mist leaves 2–3 times weekly to boost humidity

Fertilization

Diluted balanced liquid feed every 2–3 weeks. Cease fertilization in autumn and winter when growth slows

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench; avoid undiluted application to prevent root burn
Pruning
  • Remove yellowing or damaged leaves at the base to maintain plant health and airflow
  • Trim spent flower stems to redirect energy toward foliage growth
  • Divide overcrowded rhizomes during spring repotting to propagate new plants
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to oral pain, drooling, vomiting, and difficulty swallowing

Humans: Contains soluble calcium oxalates; ingestion causes mild oral irritation and temporary discomfort

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental indoor foliage plant; prized for its distinctive cross-shaped leaf markings