Lined Sinningia (Streaked Sinningia) care

Light

Bright but filtered. Lined Sinningia burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Best in a brightly lit south- or east-facing window with light diffused through curtains; adequate light is needed to produce flower buds reliably. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering lined sinningia: every 7–10 days in growth; very sparingly during dormancy. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep the root zone moderately moist during the growing season but allow the compost to partially dry between waterings; reduce to near-dry after leaves drop for winter.

Soil and pot

Lined Sinningia grows best in gritty, well-draining potting compost. Mix standard peat-free compost with 30–40% perlite or coarse grit; the large caudex is prone to rot in heavy, moisture-retentive mixes. 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

Lined Sinningia sits happiest at around 45–65% humidity and 16–26 °C in growth; 10–15 °C during dormancy (61–79 °F in growth; 50–59 °F during dormancy). Average indoor humidity is generally adequate; avoid siting near heating vents which cause excessive drying and leaf tip scorch. If you keep the room above 16–26 °C in growth; 10–15 °C during dormancy 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 lined sinningia sparingly. Feed with a half-strength balanced liquid fertiliser every two weeks throughout the growing and flowering season; withhold from dormancy until new growth begins. 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 lined sinningia in the Growli community. Each is annotated with the most common cause so you know where to start.

• Caterpillar damage to flower buds — Caterpillars tunnel into unopened buds causing distortion and failure to open; inspect plants grown outdoors in summer and remove larvae by hand or use a biological control such as Bacillus thuringiensis.
• Caudex rot from overwatering — The large exposed tuber is very susceptible to rot if compost stays wet; always use a pot with drainage holes and let the compost partly dry between waterings.

Propagation

Stem cuttings root in humid conditions with bottom heat of 22–24 °C. Leaf cuttings with petioles are also viable. The species can be raised from seed sown on the surface of a fine, moist gesneriad mix at 22 °C. 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

Lined Sinningia is mildly toxic to pets. The ASPCA lists Sinningia speciosa (Gloxinia) as non-toxic to cats, dogs, and horses. S. lineata is not individually listed; classified as mildly toxic as a precaution pending species-level verification. 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.

Lined Sinningia deep-dive guides

Every aspect of lined sinningia care, each with its own calibrated guide:

• Common lined sinningia problems & fixes
• Lined Sinningia watering schedule
• Lined Sinningia light requirements
• Best soil mix for lined sinningia
• Lined Sinningia fertilizing guide
• When to repot lined sinningia
• How to propagate lined sinningia
• How to prune lined sinningia
• What's eating my lined sinningia?
• Lined Sinningia growth rate & size
• Lined Sinningia cold hardiness
• Lined Sinningia temperature & humidity
• Is lined sinningia toxic to cats & dogs?
• Is lined sinningia toxic to cats?
• Is lined sinningia toxic to dogs?
• All 37 Sinningia varieties
• Getting lined sinningia to bloom

Featured in these plant shortlists

Lined Sinningia qualifies for 2 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 flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Lined Sinningia is also commonly called Lined Sinningia or Streaked Sinningia.

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