Scarlet Begonia (Angel wing begonia) care

Light

Scarlet Begonia is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Provide bright indirect light year-round; brief direct morning sun is tolerated but strong afternoon sun will scorch the leaves and fade the red undersides. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water scarlet begonia when top 2–3 cm of soil feels dry. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Water thoroughly then allow the top layer to dry slightly before rewatering; reduce frequency in winter but never allow the rootball to dry out completely.

Soil and pot

Scarlet Begonia grows best in well-draining peat-free multipurpose mixed with perlite. A 2:1 ratio of multipurpose compost to perlite provides the moisture retention and aeration cane begonias need; avoid dense potting mixes that stay wet. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Scarlet Begonia sits happiest at around 50–70% humidity and 16–27°C (60–80°F). Benefits from above-average humidity; stand the pot on a pebble tray filled with water or use a nearby humidifier, but avoid misting directly onto the leaves to prevent fungal spots. If you keep the room above 16–27°C year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed scarlet begonia sparingly. Feed monthly during the growing season (spring through early autumn) with a balanced liquid fertiliser at half the recommended strength. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on scarlet begonia in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew — White powdery coating on leaves is common in low-airflow conditions; improve ventilation, avoid wetting foliage, and treat with a dilute neem oil spray if severe.
• Root rot — Caused by overwatering or poorly draining compost; wilting despite moist soil and blackened stem bases are warning signs — repot into fresh dry mix and trim rotten roots.
• Spider mites — Fine webbing on stems and mottled leaves indicates spider mites, which thrive in dry indoor air; raise humidity and wipe leaves with a damp cloth or use an insecticidal soap spray.

Propagation

Take 10–12 cm stem cuttings just below a node in spring or early summer and root in a moist perlite-sphagnum mix under a humidity dome; leaf cuttings with a short petiole can also be used. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Scarlet Begonia is toxic to pets. ASPCA lists Begonia species as toxic to cats, dogs, and horses. The toxic principle is soluble calcium oxalates, most concentrated in the underground parts. Ingestion causes oral irritation, excessive drooling, and vomiting. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Scarlet Begonia deep-dive guides

Every aspect of scarlet begonia care, each with its own calibrated guide:

• Common scarlet begonia problems & fixes
• Scarlet Begonia watering schedule
• Scarlet Begonia light requirements
• Best soil mix for scarlet begonia
• Scarlet Begonia fertilizing guide
• When to repot scarlet begonia
• How to propagate scarlet begonia
• How to prune scarlet begonia
• What's eating my scarlet begonia?
• Scarlet Begonia growth rate & size
• Scarlet Begonia cold hardiness
• Scarlet Begonia temperature & humidity
• Is scarlet begonia toxic to cats & dogs?
• Is scarlet begonia toxic to cats?
• Is scarlet begonia toxic to dogs?
• All 241 Begonia varieties

Featured in these plant shortlists

Scarlet Begonia qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Scarlet Begonia is also known as Scarlet begonia, Angel wing begonia, and Cane begonia.

• Longan care — light, water and common problems
• Cherimoya care — light, water and common problems
• Soursop care — light, water and common problems
• All 10153 plant care guides in the Growli library