Tat Soi 'Yukina Savoy' (Yukina Savoy) care

Light

Most houseplants will scorch where tat soi 'yukina savoy' thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Full sun in cool seasons; give afternoon shade in late spring and summer to delay bolting. Tolerates partial shade and still produces tender leaf in 4-6 hours of sun. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

For tat soi 'yukina savoy' in the ground or in a bed, aim for when top 2-3 cm of soil is dry, roughly every 2-4 days in warm weather. Soak the root zone rather than misting the foliage; deep, less-frequent watering trains roots downward and produces a more drought-resilient plant by mid-season. Keep soil evenly moist for fast, tender growth. Drought stress triggers bolting and sharpens flavour; mulch to buffer moisture and never let it wilt repeatedly.

Soil and pot

Tat Soi 'Yukina Savoy' grows best in fertile, moisture-retentive loam, ph 6.0-7.5. Rich in organic matter with good drainage. Work in compost before sowing; brassicas are hungry feeders that respond to a firm, well-limed seedbed. 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

Tat Soi 'Yukina Savoy' sits happiest at around 40-70% humidity and 10-22°C (50-72°F). An outdoor field crop indifferent to ambient humidity. Good airflow matters more than humidity to discourage downy mildew on the crowded rosettes. If you keep the room above 10 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 tat soi 'yukina savoy' sparingly. Side-dress with a balanced or nitrogen-leaning fertiliser 2-3 weeks after sowing, or feed every 2-3 weeks with diluted liquid feed for cut-and-come-again harvests. Avoid excess nitrogen, which can make leaves soft and aphid-prone. 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 tat soi 'yukina savoy' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Bolting — Heat and long days push it to flower; the savoy type resists this better than flat tatsoi but still bolts in late-spring heat. Sow in cool windows and harvest young.
• Flea beetles — Shotgun-hole pitting in leaves, worst on seedlings. Cover with fine insect mesh from sowing and keep plants growing quickly.
• Cabbage caterpillars / aphids — Caterpillars chew foliage and aphids cluster in leaf crevices. Inspect undersides; use mesh, hand-pick, or a soft soap spray.
• Downy / club root — Crowded, wet rosettes invite downy mildew; acidic or waterlogged ground risks clubroot. Space plants, water at the base, and rotate brassicas on a 3-4 year cycle.

Propagation

From seed only. Direct-sow 1 cm deep or start in modules; germinates in 5-10 days at 15-20°C. Succession-sow every 2-3 weeks for a continuous cool-season supply. 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

Tat Soi 'Yukina Savoy' is mildly toxic to pets. Not individually listed by the ASPCA. Like other Brassica greens it contains glucosinolates/isothiocyanates that can cause vomiting and diarrhoea in dogs and cats if eaten in quantity; treat with caution and verify with a vet for pets. 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.

Tat Soi 'Yukina Savoy' deep-dive guides

Every aspect of tat soi 'yukina savoy' care, each with its own calibrated guide:

• Tat Soi 'Yukina Savoy' watering schedule
• Tat Soi 'Yukina Savoy' light requirements
• Best soil mix for tat soi 'yukina savoy'
• Tat Soi 'Yukina Savoy' fertilizing guide
• When to repot tat soi 'yukina savoy'
• How to propagate tat soi 'yukina savoy'
• Tat Soi 'Yukina Savoy' growth rate & size
• Tat Soi 'Yukina Savoy' cold hardiness
• Tat Soi 'Yukina Savoy' temperature & humidity
• Is tat soi 'yukina savoy' toxic to cats & dogs?
• Is tat soi 'yukina savoy' toxic to cats?
• Is tat soi 'yukina savoy' toxic to dogs?

Related guides

Tat Soi 'Yukina Savoy' is also known as Yukina Savoy, savoy tatsoi, and Japanese savoy mustard.

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• All 5561 plant care guides in the Growli library