Torenia fournieri 'Summer Wave Large Violet' (Summer Wave Violet Wishbone Flower) care

Light

Bright but filtered. Torenia fournieri 'Summer Wave Large Violet' burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Partial shade or bright filtered light suits it best, making it a top shade-tolerant summer annual. Morning sun with afternoon shade is ideal; harsh midday sun in hot climates scorches foliage and dulls the violet colour. 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 torenia fournieri 'summer wave large violet': keep evenly moist; water every 2-4 days, daily for baskets in heat. 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. Needs steady moisture and resents drought, which triggers wilting and flower drop. Water when the top centimetre dries, keeping the vigorous root system evenly moist; fast-growing baskets dry out quickly and may need daily attention.

Soil and pot

Torenia fournieri 'Summer Wave Large Violet' grows best in fertile, moisture-retentive, free-draining soil or mix. Prefers rich, humus-rich, slightly acidic soil (pH 5.5-6.5) that stays moist but drains well. Enrich beds with compost; in containers use a good moisture-retentive peat-free mix. Lean, dry soil limits this vigorous grower. 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

Torenia fournieri 'Summer Wave Large Violet' sits happiest at around 50-70% humidity and 18-29°C (64-85°F). Thrives in warm, humid summer air that wilts many bedding plants. Maintain airflow around dense trailing growth to limit leaf spot and powdery mildew in persistently wet, stagnant conditions. If you keep the room above 18 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 torenia fournieri 'summer wave large violet' sparingly. A vigorous, hungry trailer that rewards regular feeding. Apply a balanced liquid fertiliser every 1-2 weeks in containers, or use slow-release feed at planting plus periodic top-ups, to keep the heavy bloom flush going all season. 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 torenia fournieri 'summer wave large violet' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Drought wilting and bloom loss — Vigorous baskets dry fast and flag quickly; keep the mix evenly moist and check daily in summer.
• Sun scorch — Intense direct sun fades and burns foliage; grow in partial or afternoon shade.
• Fungal leaf disease — Dense, wet, crowded growth invites powdery mildew and leaf spot; ensure airflow and water at the base.
• Nutrient hunger in containers — This heavy bloomer exhausts pot nutrients fast; feed regularly to avoid pale leaves and reduced flowering.

Propagation

As a hybrid trailing selection it is propagated mainly from softwood stem cuttings, which root readily in moist mix; seed-raised types are surface-sown indoors 8-10 weeks before the last frost at 21-24°C with light to aid germination. 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

Torenia fournieri 'Summer Wave Large Violet' is mildly toxic to pets. Torenia fournieri is not individually listed in the ASPCA's toxic or non-toxic plant database, so a definitive pet-safe status cannot be confirmed; treat with caution and verify with a vet. There is no documented toxic principle, and any effect from ingestion is most likely mild, transient digestive upset. 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.

Torenia fournieri 'Summer Wave Large Violet' deep-dive guides

Every aspect of torenia fournieri 'summer wave large violet' care, each with its own calibrated guide:

• Torenia fournieri 'Summer Wave Large Violet' watering schedule
• Torenia fournieri 'Summer Wave Large Violet' light requirements
• Best soil mix for torenia fournieri 'summer wave large violet'
• Torenia fournieri 'Summer Wave Large Violet' fertilizing guide
• When to repot torenia fournieri 'summer wave large violet'
• How to propagate torenia fournieri 'summer wave large violet'
• Torenia fournieri 'Summer Wave Large Violet' growth rate & size
• Torenia fournieri 'Summer Wave Large Violet' cold hardiness
• Torenia fournieri 'Summer Wave Large Violet' temperature & humidity
• Is torenia fournieri 'summer wave large violet' toxic to cats & dogs?
• Is torenia fournieri 'summer wave large violet' toxic to cats?
• Is torenia fournieri 'summer wave large violet' toxic to dogs?
• Getting torenia fournieri 'summer wave large violet' to bloom

Featured in these plant shortlists

Torenia fournieri 'Summer Wave Large Violet' qualifies for 6 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 trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• 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

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Torenia fournieri 'Summer Wave Large Violet' is also commonly called Summer Wave Violet Wishbone Flower or Trailing Violet Torenia.

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