Coleus (painted nettle) care

Light

In the wild coleus grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Sun cultivars take direct sun outdoors; shade cultivars want bright indirect light indoors. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Aim for when the top 1-2 cm of soil is dry, every 4-7 days for coleus, 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. Wilts dramatically when dry; perks up after watering. Avoid drying out repeatedly.

Soil and pot

Coleus grows best in rich free-draining mix. Compost with 20% perlite. 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

Coleus sits happiest at around 50-60% humidity and 18-27°C (65-80°F). Average household humidity is fine. 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 coleus sparingly. Half-strength balanced feed every 2-3 weeks in growing 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 coleus in the Growli community. Each is annotated with the most common cause so you know where to start.

• Leggy stems — Pinch flowers and growing tips every 1-2 weeks.
• Faded colour — Insufficient light for the cultivar.
• Wilted leaves — Coleus wilts fast; water and they recover within hours.
• Mealybugs and whitefly — Common indoor pests; treat with horticultural soap.

Propagation

Stem cuttings root in water in 1-2 weeks. 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

Coleus is toxic to pets. ASPCA lists Coleus (Plectranthus scutellarioides) as toxic to cats, dogs, and horses due to essential oils. Symptoms include vomiting, diarrhoea, and depression. 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.

Coleus deep-dive guides

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

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

Featured in these plant shortlists

Coleus qualifies for 5 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 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.
• 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 houseplants to propagate in water — Houseplants that root from a cutting in a glass of water — the easiest, cheapest way to turn one plant into many.
• Browse all 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Coleus is also known as painted nettle, flame nettle, and Plectranthus scutellarioides.

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• All 10153 plant care guides in the Growli library