Climbing Sundew (Bridal rainbow sundew) care

Light

In the wild climbing sundew 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. Provide at least 4 hours of bright light daily during the growing season; full morning sun with afternoon shade suits it well, replicating the dappled light of the Australian kwongan heath it inhabits. 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 tray method autumn–spring; bone dry summer dormancy for climbing sundew, 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. Keep soil continuously moist during the growing season using only distilled or rainwater; once leaves yellow and die back in late spring remove the pot from the tray and allow the substrate to dry completely for 3–4 months.

Soil and pot

Climbing Sundew grows best in sandy peat mix. Use 1 part peat moss to 1 part coarse washed sand; the gritty mix drains freely when dry in summer yet retains adequate moisture during the wet winter growing months. 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

Climbing Sundew sits happiest at around 40–60% humidity and 5–25 °C (growing season); dormant tubers tolerate up to 35 °C when dry (41–77 °F (growing season); dormant tubers tolerate up to 95 °F when dry). Moderate ambient humidity suits this species; very high humidity during the dry summer dormancy period increases the risk of tuber rot. If you keep the room above 5–25 °C (growing season); dormant tubers tolerate up to 35 °C when dry 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 climbing sundew sparingly. Place 2–3 small insects on leaves every few weeks during active winter–spring growth; no soil feeding. 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 climbing sundew in the Growli community. Each is annotated with the most common cause so you know where to start.

• Stem collapse during dormancy transition — Stems become limp and mushy as the plant senesces — this is normal die-back, not disease; remove dead top growth and allow the pot to dry down gradually rather than cutting off water abruptly.
• Germination failure — Seeds require smoke treatment or gibberellic acid (GA3) to break dormancy reliably; untreated seed often shows very low or zero germination.

Propagation

Tuber division when dormant in summer; seed germination is improved significantly by smoke-water treatment or soaking in 250 ppm GA3 solution before sowing on moist peat–sand. 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

Climbing Sundew is mildly toxic to pets. Drosera species are not listed in the ASPCA Toxic and Non-Toxic Plant database; they contain plumbagin which may cause mild gastrointestinal irritation. Treat as mildly-toxic for cats and dogs until an authoritative non-toxic classification is confirmed. 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.

Climbing Sundew deep-dive guides

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

• Common climbing sundew problems & fixes
• Climbing Sundew watering schedule
• Climbing Sundew light requirements
• Best soil mix for climbing sundew
• Climbing Sundew fertilizing guide
• When to repot climbing sundew
• How to propagate climbing sundew
• How to prune climbing sundew
• What's eating my climbing sundew?
• Climbing Sundew growth rate & size
• Climbing Sundew cold hardiness
• Climbing Sundew temperature & humidity
• Is climbing sundew toxic to cats & dogs?
• Is climbing sundew toxic to cats?
• Is climbing sundew toxic to dogs?
• All 46 Drosera varieties
• Getting climbing sundew to bloom

Featured in these plant shortlists

Climbing Sundew 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 drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Climbing Sundew is also known as Climbing sundew, Bridal rainbow sundew, and Large-flowered sundew.

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• All 10153 plant care guides in the Growli library