How to care for Rex Begonia
Begonia rex · Begoniaceae
Grown purely for its swirled, metallic leaves in silver, purple, burgundy, and green, the rex begonia is foliage as art. It grows from a shallow rhizome and dislikes both soggy soil and wet leaves. Fussy about balance, but unforgettable when content. Water roughly every 6 days while it's growing (about every 11 in winter), give it a bright room away from the window, kept above 59°F (15°C) — it wants humid air.
Care at a glance
Water at the soil line when the top few centimeters dry, keeping water off the leaves and the rhizome out of swamp.
Bright, indirect light — an east window is ideal; direct sun bleaches the metallic sheen.
Quarter- to half-strength balanced fertilizer monthly while growing.
Mistakes that kill this plant
- Misting or splashing the foliage, which invites mildew and rot.
- Deep pots with heavy soil around the shallow rhizome.
- Tossing it during its winter rest — the rhizome is usually still alive.
Seasonal tips
- It wants humid air but dry leaves — provide humidity with airflow, never misting.
- Many rexes semi-rest in winter, dropping leaves; keep the rhizome barely moist and wait for spring.
- Propagate spare leaves by wedge or by pinning a leaf flat on moist mix.
Is it safe for pets?
We have Rex Begonia recorded as toxic to cats and dogs.
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Toxicity here is informational, not a safety guarantee. Those are our own records, compiled by following the ASPCA's published toxic and non-toxic plant lists and Pet Poison Helpline's plant poison list rather than copied from them — confirm anything that matters against the ASPCA's published lists, which this one is matched to, or with your vet. If your pet ingested this plant, contact your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.