Drosera capensis 'Red' (Red Cape Sundew) care

Light

Aim for at least 4-6 hours of direct sun on the leaves. Wants bright light; several hours of direct sun or a strong grow light brings out the all-red colouration and abundant sticky dew. In dim light it stays green and produces little mucilage. If your only bright window faces south, that's perfect for drosera capensis 'red' — same window any aroid would fry on.

Watering

Watering drosera capensis 'red': keep media constantly wet; stand in 1-2 cm of water year-round via the tray method. 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. Use rain, distilled or RO water only. Cape sundews like to stay permanently waterlogged, unlike Nepenthes; never let the media dry out and never use tap or mineral water.

Soil and pot

Drosera capensis 'Red' grows best in nutrient-free carnivorous mix. 1:1 sphagnum peat and washed silica sand or perlite. Avoid all standard composts and fertilisers; mineral nutrients burn the roots. 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

Drosera capensis 'Red' sits happiest at around 40-60% humidity and 18-30°C; tolerates 5-35°C (65-86°F; tolerates 41-95°F). Adapts well to average household humidity provided the roots stay wet; no terrarium is needed. Higher humidity boosts dew production but is not essential. 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 drosera capensis 'red' sparingly. Never feed the roots. It catches its own insects on its sticky leaves; indoors you can feed a leaf a small rehydrated insect or a few crumbs of fish food occasionally. No fertiliser in the media. 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 drosera capensis 'red' in the Growli community. Each is annotated with the most common cause so you know where to start.

• No dew on the tentacles — Too little light, low humidity or recent disturbance. Move to brighter light; dew usually returns within a day or two.
• Green instead of red — The all-red form only colours up in strong light. Increase sun or grow-light intensity to develop the burgundy tone.
• Aggressive self-seeding — Cape sundews seed prolifically and pop up in nearby pots. Remove flower stalks before seed sets if you want to limit spread.
• Media drying out — Letting the tray run dry stresses or kills the plant. Keep it standing in pure water at all times.

Propagation

Very easy: sow the abundant seed on damp media, take leaf cuttings or root cuttings laid on wet sphagnum, or divide crowded clumps. Leaf and root cuttings strike readily under bright light. 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

Drosera capensis 'Red' is mildly toxic to pets. Drosera is not individually listed in the ASPCA database; other carnivorous plants like the Venus Fly Trap and California Pitcher Plant are ASPCA non-toxic and sundews are widely regarded as low-risk. Treat as uncertain: ingestion may cause mild gastrointestinal upset and the sticky mucilage can irritate. Verify with a vet if a pet eats any. 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.

Drosera capensis 'Red' deep-dive guides

Every aspect of drosera capensis 'red' care, each with its own calibrated guide:

• Drosera capensis 'Red' watering schedule
• Drosera capensis 'Red' light requirements
• Best soil mix for drosera capensis 'red'
• Drosera capensis 'Red' fertilizing guide
• When to repot drosera capensis 'red'
• How to propagate drosera capensis 'red'
• Drosera capensis 'Red' growth rate & size
• Drosera capensis 'Red' cold hardiness
• Drosera capensis 'Red' temperature & humidity
• Is drosera capensis 'red' toxic to cats & dogs?
• Is drosera capensis 'red' toxic to cats?
• Is drosera capensis 'red' toxic to dogs?

Featured in these plant shortlists

Drosera capensis 'Red' qualifies for 2 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Drosera capensis 'Red' is also commonly called Red Cape Sundew or All-Red Cape Sundew.

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