Dionaea muscipula 'B52' (B52 Venus flytrap) care

Light

Dionaea muscipula 'B52' needs sun on the leaves, not just bright ambient room light. At least 4-6 hours of direct sun, or a strong grow-light. Full sun produces big traps and red interiors; weak light yields small, floppy, all-green traps. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water dionaea muscipula 'b52' keep permanently wet; stand in 1-2 cm of pure water in the growing season. 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. Rainwater, distilled, or RO only — tap minerals are fatal. Reduce standing water and keep just damp during winter dormancy.

Soil and pot

Dionaea muscipula 'B52' grows best in acidic mineral-free carnivorous mix. 1:1 sphagnum peat and silica sand or perlite, or pure long-fibre sphagnum. Never use compost, lime, or fertiliser. 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

Dionaea muscipula 'B52' sits happiest at around 40-70% humidity and -5-35°C (23-95°F). Ordinary outdoor or room humidity is fine; flytraps do not need a sealed terrarium and benefit from open-air ventilation. High humidity is unnecessary. If you keep the room above 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 dionaea muscipula 'b52' sparingly. Never fertilise the roots. It catches its own insects; if grown indoors, feed a trap a live or rehydrated insect every few weeks. Do not feed meat or mineral fertiliser, and don't trigger traps for fun — each trap has limited closures. 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 dionaea muscipula 'b52' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Traps stay small and green — Not enough light. Move to direct sun or a stronger grow-light to develop large, red-throated traps.
• Plant dies after about a year — Missed dormancy. Flytraps need a cold winter rest of 3-4 months near 2-10°C; without it they exhaust and die.
• Blackening traps — Often normal — traps die back after 3-4 closures or several catches. Trim spent traps; only worry if the whole crown rots.
• Weak growth after flowering — Flowering drains a young plant. Cut the flower stalk early unless you want seed, to redirect energy into traps.

Propagation

By division of the rhizome/offsets in late winter, by leaf-pulling cuttings laid on damp sphagnum, or from seed (slow, and seedlings won't all match the cultivar). Flower-stalk cuttings also root. 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

Dionaea muscipula 'B52' is pet-safe. ASPCA-listed as non-toxic to dogs, cats, and horses (Venus flytrap, Dionaea muscipula); this giant cultivar shares that classification. The ASPCA notes ingestion may cause at most mild gastrointestinal upset, so it is considered safe, though the plant is fragile and best kept where pets cannot damage it. 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.

Dionaea muscipula 'B52' deep-dive guides

Every aspect of dionaea muscipula 'b52' care, each with its own calibrated guide:

• Dionaea muscipula 'B52' watering schedule
• Dionaea muscipula 'B52' light requirements
• Best soil mix for dionaea muscipula 'b52'
• Dionaea muscipula 'B52' fertilizing guide
• When to repot dionaea muscipula 'b52'
• How to propagate dionaea muscipula 'b52'
• Dionaea muscipula 'B52' growth rate & size
• Dionaea muscipula 'B52' cold hardiness
• Dionaea muscipula 'B52' temperature & humidity
• Is dionaea muscipula 'b52' toxic to cats & dogs?
• Is dionaea muscipula 'b52' toxic to cats?
• Is dionaea muscipula 'b52' toxic to dogs?

Featured in these plant shortlists

Dionaea muscipula 'B52' qualifies for 9 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best pet-safe plants for bright light — Non-toxic to cats and dogs and happy in a bright, sunny spot — safe plants for your best-lit windowsill.
• 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.
• 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.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Best small pet-safe plants — Compact, tabletop houseplants that are also ASPCA non-toxic to cats and dogs — safe greenery for a desk or shelf.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Dionaea muscipula 'B52' is also commonly called B52 Venus flytrap.

• Monstera care — light, water and common problems
• Pothos care — light, water and common problems
• Fiddle leaf fig care — light, water and common problems
• All 1284 plant care guides in the Growli library