Lacinato Kale (Tuscan kale) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Full sun, 6 or more hours daily, for sturdy, productive plants. Tolerates partial shade, where growth is slower and leaves are looser and more tender. If your only bright window faces south, that's perfect for lacinato kale — same window any aroid would fry on.

Watering

Crops like lacinato kale reward consistent watering — when the top 2-3 cm of soil is dry, every 4-7 days. The mistake is the daily light sprinkle: it never reaches the deeper roots. A long soak twice a week beats a five-minute splash every day. Give about 2-3 cm of water weekly. Consistent moisture keeps leaves tender and mild; drought makes them tough and bitter and stresses plants into pest susceptibility.

Soil and pot

Lacinato Kale grows best in rich, firm, well-drained loam. Fertile, organic-rich and moisture-retentive with a firm root run. Slightly acidic to neutral pH 6.0-7.5; liming toward neutral helps deter clubroot in brassica beds. 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

Lacinato Kale sits happiest at around Outdoor ambient humidity and 7-24°C (45-75°F). An outdoor crop with no specific humidity needs. Good spacing keeps foliage airy and reduces downy mildew and aphid build-up. If you keep the room above 7 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 lacinato kale sparingly. A hungry leafy brassica. Dig in plenty of compost or aged manure before planting and side-dress or liquid-feed with a nitrogen-rich fertiliser every 3-4 weeks through the growing season for continuous leaf production. 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 lacinato kale in the Growli community. Each is annotated with the most common cause so you know where to start.

• Cabbage caterpillars — Cabbage white and looper caterpillars chew large holes and soil leaves with frass. Cover with insect mesh, hand-pick eggs and caterpillars, or treat with Bt.
• Aphids (cabbage aphid) — Grey-waxy colonies cluster in leaf crevices and growing tips, distorting leaves. Blast off with water, encourage predators, or use insecticidal soap, checking hidden folds.
• Clubroot — Stunted, wilting plants with swollen, distorted roots in infected brassica soil. Rotate crops, lime to near-neutral pH and improve drainage; the spores persist for years.
• Bitter, tough leaves — Heat and drought stress toughen and embitter the leaves. Keep soil moist, harvest younger leaves, and remember that a light frost actually sweetens mature plants.

Propagation

Grown from seed. Sow indoors or in a seedbed 1 cm deep and transplant out at 4-6 weeks, spacing 45 cm apart and planting firmly. Direct-sowing works in mild climates; it does not propagate from cuttings. 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

Lacinato Kale is mildly toxic to pets. Garden kale (Brassica oleracea) is not individually listed by the ASPCA and is generally non-toxic to dogs, but it contains N-propyl disulfide and thiocyanate/isothiocyanate compounds that can cause Heinz-body hemolytic anemia in cats and gastrointestinal irritation with repeated or large feeding. Treat as cat-unsafe in quantity and verify any deliberate feeding with a vet. 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.

Lacinato Kale deep-dive guides

Every aspect of lacinato kale care, each with its own calibrated guide:

• Lacinato Kale watering schedule
• Lacinato Kale light requirements
• Best soil mix for lacinato kale
• Lacinato Kale fertilizing guide
• When to repot lacinato kale
• How to propagate lacinato kale
• Lacinato Kale growth rate & size
• Lacinato Kale cold hardiness
• Lacinato Kale temperature & humidity
• Is lacinato kale toxic to cats & dogs?
• Is lacinato kale toxic to cats?
• Is lacinato kale toxic to dogs?

Related guides

Lacinato Kale is also known as Lacinato kale, Tuscan kale, dinosaur kale, cavolo nero, and black kale.

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