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Plant care

Pink Spot Begonia (Serrated-petal begonia) care

Begonia serratipetala

Also called Pink spot begonia, Serrated-petal begonia, Pink dots begonia.

RHS H1bUSDA 10-12Toxic to petsIndoor 45–75 cm tall and 30–50 cm wide indoors.

Watering rhythm

5-8days

Every 5–8 days, keeping soil evenly moist but not waterlogged

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Light

Bright indirect light (just back from a sunny window)

Soil

Rich, airy, moisture-retentive but free-draining compost

Humidity

55–75%

Temp

17–28 °C

Pet safety

Toxic to pets

Mature size

45–75 cm tall and 30–50 cm wide indoors.

Care at a glance

Light

In the wild pink spot 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. Bright, indirect light for 4–6 hours daily is essential to preserve the pink spotting and bronze leaf colour; an east- or west-facing windowsill is ideal, but protect from harsh afternoon sun which fades and burns the foliage. 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 5–8 days, keeping soil evenly moist but not waterlogged for pink spot 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. Unlike more drought-tolerant begonias, B. serratipetala prefers consistently moist (not wet) compost; allow only the very surface to dry before re-watering, and reduce slightly in winter.

Soil and pot

Pink Spot Begonia grows best in rich, airy, moisture-retentive but free-draining compost. Blend peat-free houseplant compost with 15% perlite and 10% horticultural grit; the goal is a medium that holds some moisture without compacting or becoming anaerobic. 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

Pink Spot Begonia sits happiest at around 55–75% humidity and 17–28 °C (63–82 °F). High humidity helps prevent leaf edge crisping and supports the lush, glossy foliage texture; group plants together or use a room humidifier — this species tolerates gentle misting better than hairy-leaved types because its leaves are smooth and glossy. If you keep the room above 17–28 °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 pink spot begonia sparingly. Feed every two weeks from March to October with a balanced liquid fertiliser at half-strength; too much nitrogen produces lush but pale growth at the expense of the characteristic dark colouration and spotting. 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 pink spot begonia in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Fading pink spotting — The vivid pink dots fade to dull brown or disappear entirely in low light; relocate to a brighter position with filtered sun to restore colouration — recovery takes 4–6 weeks.
  • Spider mites — Hot, dry indoor air encourages spider mite infestations visible as fine webbing and stippled leaves; increase humidity, wipe leaves with a damp cloth regularly, and treat with insecticidal soap or neem oil at the first sign.

Propagation

Stem cuttings 8–10 cm long root reliably in water or moist perlite within 3–4 weeks; leaf-bud cuttings (a single leaf node with a short stem section) also work well under humidity. 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

Pink Spot Begonia is toxic to pets. As a Begonia species it is toxic to cats and dogs per the ASPCA; soluble calcium oxalates cause oral pain, hypersalivation, vomiting, and difficulty swallowing; the roots and tubers contain the highest concentration. 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.

Pink Spot Begonia care — frequently asked questions

What is the common name for Begonia serratipetala?

Begonia serratipetala is most commonly called Pink Spot Begonia, but it is also known as Pink spot begonia, Serrated-petal begonia, Pink dots begonia. The names refer to the same species, so care instructions for Pink Spot Begonia apply identically to anything sold as Serrated-petal begonia.

How much light does pink spot begonia need?

Pink Spot Begonia grows best in bright indirect light (just back from a sunny window). Bright, indirect light for 4–6 hours daily is essential to preserve the pink spotting and bronze leaf colour; an east- or west-facing windowsill is ideal, but protect from harsh afternoon sun which fades and burns the foliage.

How often should I water pink spot begonia?

Water pink spot begonia every 5–8 days, keeping soil evenly moist but not waterlogged. Unlike more drought-tolerant begonias, B. serratipetala prefers consistently moist (not wet) compost; allow only the very surface to dry before re-watering, and reduce slightly in winter. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is pink spot begonia toxic to cats and dogs?

Pink Spot Begonia is toxic to pets. As a Begonia species it is toxic to cats and dogs per the ASPCA; soluble calcium oxalates cause oral pain, hypersalivation, vomiting, and difficulty swallowing; the roots and tubers contain the highest concentration.

What USDA hardiness zone does pink spot begonia grow in?

Pink Spot Begonia is rated for USDA zone 10-12 (indoor in most climates) and RHS hardiness H1b. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Pink Spot Begonia deep-dive guides

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

Featured in these plant shortlists

Pink Spot Begonia qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Pink Spot Begonia is also known as Pink spot begonia, Serrated-petal begonia, and Pink dots begonia.