Begonia 'Pin Up Flame' (pin up flame begonia) care

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness begonia 'pin up flame' grows fastest in. Flowers most freely in partial shade or bright dappled light, ideally with morning sun and afternoon shade. Deep shade cuts flowering and the bicolour contrast; hot, direct afternoon sun scorches the petals and the soft foliage. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for keep evenly moist; water when the surface begins to dry, often every 2-4 days in summer pots for begonia 'pin up flame', 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. Maintain consistently moist but never waterlogged compost, watering at the base to keep the brittle stems and single flowers dry. Containers dry fast in summer heat and may need checking daily. Taper off watering as the foliage yellows in autumn to start tuber dormancy.

Soil and pot

Begonia 'Pin Up Flame' grows best in rich, moisture-retentive but free-draining potting compost. Plant in a quality multipurpose or peat-free compost lightened with grit or perlite. The shallow roots and brittle, succulent stems need an open medium; heavy, sodden compost rots the crown and tuber. 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

Begonia 'Pin Up Flame' sits happiest at around Average to moderately high (40-60%) humidity and 13-24°C (frost-tender) (55-75°F (frost-tender)). Thrives in ordinary garden and patio humidity. Airflow is more important than added moisture, since dense, damp, stagnant conditions encourage powdery mildew and grey mould on the soft tissue. If you keep the room above 13 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 begonia 'pin up flame' sparingly. Feed every 1-2 weeks in summer with a high-potash liquid feed such as a tomato fertiliser to keep the bicolour flowers coming. Use balanced feed early in the season and switch to high-potash as buds form; stop feeding as growth dies back. 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 begonia 'pin up flame' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew — White dusty film on leaves in still, humid, crowded sites. Space plants, improve airflow and keep foliage dry.
• Petal and flower scorch — Direct hot afternoon sun marks and crisps the bicolour blooms. Site in partial or dappled shade.
• Bud drop — Inconsistent watering, heat or sudden relocation can cause buds to fall. Keep watering and position stable.
• Tuber rot — Wet compost in growth or damp storage rots the tuber. Use free-draining compost and overwinter dry tubers somewhere cool and frost-free.

Propagation

Propagate by basal stem cuttings in spring or by dividing dormant tubers so each section has a growth bud. As a named cultivar it is best increased vegetatively to stay true to type. 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

Begonia 'Pin Up Flame' is toxic to pets. The ASPCA lists Begonia as toxic to cats, dogs and horses. The toxic principle is soluble calcium oxalates, most concentrated in the underground tubers, which are large in tuberous begonias. Ingestion causes oral irritation, drooling, vomiting and difficulty swallowing; large amounts can cause kidney failure in grazing animals. 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.

Begonia 'Pin Up Flame' deep-dive guides

Every aspect of begonia 'pin up flame' care, each with its own calibrated guide:

• Begonia 'Pin Up Flame' watering schedule
• Begonia 'Pin Up Flame' light requirements
• Best soil mix for begonia 'pin up flame'
• Begonia 'Pin Up Flame' fertilizing guide
• When to repot begonia 'pin up flame'
• How to propagate begonia 'pin up flame'
• Begonia 'Pin Up Flame' growth rate & size
• Begonia 'Pin Up Flame' cold hardiness
• Begonia 'Pin Up Flame' temperature & humidity
• Is begonia 'pin up flame' toxic to cats & dogs?
• Is begonia 'pin up flame' toxic to cats?
• Is begonia 'pin up flame' toxic to dogs?
• Getting begonia 'pin up flame' to bloom

Featured in these plant shortlists

Begonia 'Pin Up Flame' qualifies for 8 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best low-light houseplants — Houseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
• 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 houseplants for beginners — Forgiving of irregular light and watering — the houseplants least likely to die in a new plant parent’s first season.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• 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 succulents for beginners — The easiest succulents and cacti to keep alive — selected by documented growth habit, each with the light and watering it actually wants.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Begonia 'Pin Up Flame' is also commonly called pin up flame begonia or bicolor tuberous begonia.

• Types of begonia — varieties identified, with care and pet-safety
• Peace lily care — light, water and common problems
• Bird of paradise care — light, water and common problems
• Hoya care — light, water and common problems
• All 2464 plant care guides in the Growli library