Flowering coleus (painted nettle) care

Light

Flowering coleus is what florists mean by "bright spot, no direct sun" — close enough to a south or east window to feel the brightness, with a sheer curtain or a few feet of distance keeping the sun off the leaves. Sun cultivars tolerate full sun; shade cultivars want bright indirect. A phone lux-meter at the leaf surface should read 1,500-3,000 lux at noon.

Watering

Water flowering coleus twice-weekly watering. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Wilts fast when dry; consistent moisture needed.

Soil and pot

Flowering coleus grows best in rich free-draining loam. pH 6.0-7.0. 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

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

• Flowering halts leaf production — Pinch flower spikes for more foliage; leave them for late-season pollinators.
• Leggy stems — Pinch back regularly.
• Wilted leaves — Pots dry out fast in summer; water deeply.
• Faded leaf colour — Insufficient or too much light for the cultivar.
• Mealybugs and whitefly — Treat with horticultural soap.

Companion plants

Flowering coleus pairs well with Impatiens, Begonia, and Sweet potato vine. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

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

Flowering coleus is toxic to pets. ASPCA lists Plectranthus scutellarioides as toxic to cats, dogs, and horses due to essential oils. Causes 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.

Flowering coleus deep-dive guides

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

• Common flowering coleus problems & fixes
• Flowering coleus watering schedule
• Flowering coleus light requirements
• Best soil mix for flowering coleus
• Flowering coleus fertilizing guide
• When to repot flowering coleus
• How to propagate flowering coleus
• How to prune flowering coleus
• What's eating my flowering coleus?
• Flowering coleus growth rate & size
• Flowering coleus cold hardiness
• Flowering coleus temperature & humidity
• Is flowering coleus toxic to cats & dogs?
• Is flowering coleus toxic to cats?
• Is flowering coleus toxic to dogs?
• All 21 Plectranthus varieties
• Getting flowering coleus to bloom

Featured in these plant shortlists

Flowering 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

Flowering coleus is also commonly called painted nettle or coleus.

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