Red Kohleria (Woolly Kohleria) care

Light

Bright but filtered. Red Kohleria burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Position near an east- or west-facing window with bright filtered light; insufficient light results in weak, floppy stems and sparse flowering, while harsh direct sun bleaches and scorches the velvety foliage. 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 red kohleria: every 7–10 days in the growing season, allowing the top 2–3 cm to dry; water sparingly in winter. 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. Always water at the soil level and allow excess to drain freely; the rhizomes store water so the plant withstands short dry spells better than prolonged waterlogging.

Soil and pot

Red Kohleria grows best in peat-free, well-draining, humus-rich potting mix. A blend of multipurpose compost, perlite, and fine bark creates the open, moisture-retentive but freely draining structure that suits the rhizomes; repot in spring every 1–2 years. 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

Red Kohleria sits happiest at around 50–70% humidity and 16–24°C (61–75°F). High humidity is beneficial but must be delivered via pebble trays or a room humidifier — never mist, as the hairy leaves hold moisture against the surface and invite botrytis and leaf spotting. If you keep the room above 16–24°C 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 red kohleria sparingly. Feed every 2–3 weeks during spring and summer with a high-potassium liquid fertiliser (such as tomato feed) to encourage prolific flowering; withhold all feed during the winter rest period. 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 red kohleria in the Growli community. Each is annotated with the most common cause so you know where to start.

• Aphid infestations on new growth — Confirmed RHS susceptibility; aphid colonies cluster on soft stem tips and flower buds, causing distorted growth and sticky honeydew — treat early with insecticidal soap or a blast of water, then follow up with a systemic houseplant insecticide if needed.
• Rhizome rot from overwatering — Overwatering, especially in winter when the plant is semi-dormant, causes the rhizomes to blacken and decay; always let the top of the compost dry slightly before watering and ensure the pot has drainage holes that are not blocked.

Propagation

Division of rhizomes in spring is the easiest method; alternatively, take 8–10 cm tip cuttings in spring, remove lower leaves, and root in moist perlite-coir mix at 20–22°C. Seed is viable but slow. 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

Red Kohleria is mildly toxic to pets. Kohleria eriantha is not individually listed by the ASPCA toxic or non-toxic plant database. While related Gesneriaceae genera (Saintpaulia, Episcia) are ASPCA-listed as non-toxic, Kohleria has not been formally assessed. A precautionary mildly-toxic rating is applied; contact a vet if a pet ingests the plant. 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.

Red Kohleria deep-dive guides

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

• Common red kohleria problems & fixes
• Red Kohleria watering schedule
• Red Kohleria light requirements
• Best soil mix for red kohleria
• Red Kohleria fertilizing guide
• When to repot red kohleria
• How to propagate red kohleria
• How to prune red kohleria
• What's eating my red kohleria?
• Red Kohleria growth rate & size
• Red Kohleria cold hardiness
• Red Kohleria temperature & humidity
• Is red kohleria toxic to cats & dogs?
• Is red kohleria toxic to cats?
• Is red kohleria toxic to dogs?
• All 13 Kohleria varieties

Featured in these plant shortlists

Red Kohleria qualifies for 2 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Red Kohleria is also known as Red Kohleria, Woolly Kohleria, and Tree Gloxinia.

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