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Begonia rex-cultorum
Rex‑cultorum Group
At‑a‑glance
- Group/Class: Rex‑cultorum Group
- Height × spread: 12-18 in × 12-18 in (30-45 cm × 30-45 cm)
- Bloom window: winter; flowers not showy
- Color & flower form: Showy leaves in green, silver, burgundy; small pink flowers
- Fragrance: 0 none
- USDA hardiness: zones 10-11; commonly grown indoors elsewhere
- Breeder / Year / Origin: unknown; selections derived from Begonia rex and allied species
- Pet safety: avoid
How it differs
- Grown for foliage rather than flowers.
- Rhizomatous habit with creeping stems.
- Needs bright, indirect light and steady humidity.
- Leaves scorch in direct sun more readily than many begonias.
Strengths
- Dramatic leaf colors and patterns.
- Compact size for containers and indoor use.
- Responds well to division and rhizome cuttings.
Care in one minute
Site: bright, indirect light or open shade; avoid midday sun.
Soil and pH: airy, well‑drained potting mix; neutral to slightly acidic.
Water: let the top 0.5-1 in of mix dry before watering; keep leaves dry.
Feeding: light, regular feeding in spring and summer.
Grooming: remove tired leaves; divide rhizomes to renew plants.
Overwintering: grow indoors except in zones 10-11.
Watch‑outs
- Powdery mildew and botrytis possible in stagnant, humid air.
- Prone to rot if media stays wet; water when the surface dries.
- Leaf burn in direct sun or very low humidity.
Best uses (tags)
Provenance note
A horticultural group developed by crossing Begonia rex with related species and selecting for ornate foliage.
References
- Missouri Botanical Garden – Begonia rex‑cultorum (profile)
- RHS Plant Bulletin – Begonia Rex Cultorum Group (trial notes)
- UF/IFAS – A Beginner’s Guide to Begonias: Begonia rex‑cultorum (EP632)
- ASPCA – Begonia (toxicity)
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