Scharff's Begonia (Hairy begonia) care

Light

In the wild scharff's begonia grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Provide 3–5 hours of bright, filtered light daily from an east- or west-facing window; insufficient light causes weak, etiolated growth, while direct midday sun bleaches and scorches the hairy leaves. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for every 7–10 days, allowing the top 2–3 cm to dry between waterings for scharff's begonia, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Water at soil level to protect the hairy leaves; in winter reduce frequency to every 10–14 days as growth slows, but never allow the rootball to dry out completely.

Soil and pot

Scharff's Begonia grows best in lightweight, well-draining houseplant compost. A proprietary peat-free houseplant mix amended with 20–25% perlite provides the aeration and drainage this Brazilian native requires to prevent root rot. 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

Scharff's Begonia sits happiest at around 50–65% humidity and 15–27 °C (59–81 °F). Moderate humidity suits Scharff's begonia well; avoid misting the hairy foliage as trapped moisture causes fungal spots — use a pebble tray with water instead. If you keep the room above 15–27 °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 scharff's begonia sparingly. Feed fortnightly with a balanced liquid fertiliser at half-strength from March to September; switch to a low-nitrogen, high-potassium feed when flower buds form to encourage blooming. 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 scharff's begonia in the Growli community. Each is annotated with the most common cause so you know where to start.

• Mealybugs — The dense leaf hairs provide shelter for mealybug colonies; check the undersides of leaves and stem joints regularly and treat early infestations with a cotton bud dipped in isopropyl alcohol, followed by insecticidal soap spray.
• Leggy, sparse growth — Insufficient light is the primary cause; move closer to a bright window and prune long stems back by one-third in spring to encourage branching and a more compact habit.

Propagation

Stem cuttings 8–12 cm long taken in spring or summer root readily in moist perlite or water; remove lower leaves, allow the cut end to callus briefly, then insert into the rooting medium. 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

Scharff's Begonia is toxic to pets. Listed by the ASPCA as toxic to cats and dogs; the soluble calcium oxalates present throughout the plant (concentrated in roots and tubers) cause oral irritation, salivation, nausea, and vomiting if ingested. 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.

Scharff's Begonia deep-dive guides

Every aspect of scharff's begonia care, each with its own calibrated guide:

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

Featured in these plant shortlists

Scharff's Begonia qualifies for 5 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 drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• 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.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Scharff's Begonia is also commonly called Scharff's begonia or Hairy begonia.

• Roller Jovibarba care — light, water and common problems
• Hairy Jovibarba care — light, water and common problems
• Navelwort care — light, water and common problems
• All 10153 plant care guides in the Growli library