Houseplant · Droseraceae
Venus Flytrap
Dionaea muscipula
Give it full sun, rainwater, and a cold winter rest, and your flytrap will happily catch its own dinner for years.
Full sun
Every 1–3 days
USDA 7–10
2–5 in · 5–13 cm
Overview
You already know the Venus flytrap, right? It's the one with the hinged traps that snap shut on a passing bug. It hails from a little patch of Carolina bog, where the soil's so poor the plant took up hunting just to get by. And that's exactly what makes it a bit fiddly, because pretty much everything you'd do for a regular houseplant is wrong for a flytrap.
It stays small, only a few inches across, growing as a low rosette of traps instead of a tall leafy stem. It's a true perennial, but here's the catch: it doesn't grow all year. It goes hard through spring and summer, then wants a cold winter rest, and skipping that rest is the number-one way people accidentally kill it.
Get a few things right and honestly the rest sorts itself out. Strong light, water with no minerals in it, lean acidic soil, and a cold winter each year are the whole deal. Since it catches and digests its own food, the biggest favor you can do it is just to leave it be.
Care
The short version: give it full sun, water it only with distilled, reverse-osmosis, or rainwater, pot it in a lean peat-and-sand mix, never fertilize it or feed it meat, and let it go cold and dormant for 3 to 4 months each winter.
Light
A flytrap wants full, direct sun, at least 6 hours a day and more if you can swing it. Short it on light and it stretches out pale and floppy while the traps stay small and won't redden up, so a south-facing window or a spot outside in summer beats any dim corner hands down.
Water
Stick with only distilled, reverse-osmosis, or rainwater, never tap or bottled mineral water, because the dissolved salts build up and kill the plant. During the growing season, sit the pot in a tray with about 1 to 2 cm of water and keep the soil damp. Once winter dormancy hits, ease off so the mix stays just barely moist instead of soggy.
Soil
Pot it in a lean, acidic carnivorous mix of sphagnum peat with perlite or silica sand, nothing richer. Regular potting soil, compost, or any fertilized mix will burn the roots and rot the plant, so steer clear. You're after a really acidic pH of 3.5 to 5.0.
Temperature
It's tougher than it looks, handling a wide range through the year from about 41°F to 95°F (5°C to 35°C). Summer warmth gets it growing, but it also needs a proper cold spell in winter to rest, so don't try to keep it cozy all year.
Humidity
Regular room humidity around 50% to 70% is plenty, and that constantly damp tray keeps the air near the plant moist enough on its own. No need to mist it or shut it in a terrarium, which can actually bring on mold.
Feeding
Don't fertilize, ever. A flytrap feeds itself by catching insects, and fertilizer in the soil just burns the roots and kills it. The traps pull in everything the plant needs all by themselves.
Pruning
Snip off any blackened or dead traps and spent leaves at the base with clean scissors to keep mold in check. On a young or stressed plant, go ahead and cut the tall flower stalk in spring too, since flowering drains energy the little rosette can't really spare.
Repotting
Plan on repotting every 1 to 2 years in early spring into fresh carnivorous mix. Do it when the rhizomes crowd the pot edge, the media's broken down and gone compact, or a few offsets are crammed together, and take the chance to divide while you're at it.
Size & spacing
This is a little plant, only 2 to 5 inches (5 to 13 cm) tall and about as wide. One flytrap is perfectly happy in a single small pot, so spacing isn't really a thing unless you're growing a bunch together in a shared bog planter.
Troubleshooting
Just about every flytrap problem traces back to one of four slip-ups: the wrong water, too little light, ordinary potting soil, or no winter rest. The signs below help you figure out which one's going on. Catch it early and the plant usually bounces right back.
Whole plant flopping with a soft, rotten crown
Lift the plant and you'll probably find a mushy brown rhizome, and nine times out of ten that's from ordinary soil or a hit of fertilizer. Get it repotted right away into a lean sphagnum peat and perlite or sand mix, cut off the rotted bits, and go back to mineral-free water. Any firm white rhizome that's left? It can still bounce back.
Fix:
- Repot into nutrient-poor sphagnum peat and perlite/sand mix
- Resume mineral-free water only
- Remove rotted tissue; healthy white rhizome may still regrow
Weaker every year until the plant just quits
If a flytrap kept warm and growing all year keeps fading, the missing piece is its winter dormancy. It needs a cold rest of 3 to 4 months at roughly 35°F to 50°F (2°C to 10°C), with the light and water dialed back. In a mild zone it can just sit outside, and where winters get rough an unheated room or even the fridge does the trick.
Fix:
- Provide a 3-4 month cold dormancy at roughly 2-10°C (35-50°F) with reduced light and watering
- Overwinter outdoors in mild zones or in an unheated cold space/refrigerator in colder climates
Traps going black and leaves dying off
Usually this comes down to mineral buildup from tap or bottled water, which leaves a whitish crust on the soil and holds back new growth. Swap over to distilled, reverse-osmosis, or rainwater and flush the pot to rinse those salts out. And if it's just a few older traps going black while everything else looks great? That's normal aging, since each trap only lasts a handful of catches.
Fix:
- Switch immediately to distilled, reverse-osmosis, or rainwater
- Flush the media with mineral-free water to leach out salts
- Trim off fully blackened traps at the base
- Stop hand-feeding and let the plant catch its own insects
Floppy pale growth and tiny traps that won't shut
This one's almost always just not enough light. The leaf stalks go long and floppy, and the traps come in small and green instead of tight with those red interiors. So move it into full direct sun for at least 6 hours a day, and give it a week to adjust so the leaves don't scorch on the way there.
Fix:
- Move to full direct sun (a minimum of 6+ hours, ideally outdoors or a very bright sunny window/grow light)
- Acclimate gradually over a week to avoid scorch
Toxicity
Good news if you've got pets: the Venus flytrap is non-toxic to people and animals. The ASPCA gives it the all-clear for cats and dogs, and the snap-traps are way too small and weak to hurt anything bigger than a fly. The only thing that gets hurt is the plant itself, if someone keeps snapping the traps shut for fun.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats Safe
Cats are fine here, since the ASPCA has the Venus flytrap down as non-toxic to them. Those little traps are way too small and soft to pinch a paw or a nosy whisker anyway.
Dogs Safe
It's safe for dogs too, with nothing poisonous in the leaves or traps. Sure, a dog that mouths it might get a little startle when a trap shuts, but nothing bad comes of it.
Horses Safe
There's nothing toxic in here, so a horse won't come to any harm from a taste. And honestly, a tiny bog plant a few inches wide was never going to end up on the menu.
Rabbits Safe
Nothing in a flytrap will poison a rabbit, and the traps are far too flimsy to do any damage. That said, why let a rabbit munch a slow grower down to nothing?
Livestock Safe
Cattle, goats, and sheep have nothing to fear from this one, poison-wise. It's just a harmless little curiosity, not something you'd ever find out in a pasture.
Birds Safe
Birds are totally fine around a flytrap. The traps only close on insects, not feathers, and there's nothing toxic inside.
People Safe
It's harmless to handle, kids included. A trap closing on a fingertip is the gentlest little pinch and can't break skin, so the worst that happens is you waste the plant's energy by tripping it for fun.
Touching the trigger hairs makes traps close; repeatedly poking traps for fun wastes the plant's energy and should be avoided.
Varieties
Past the everyday green-and-red flytrap, breeders have picked out cultivars for unusual color, trap size, and tooth shape. Here are a few that really stand out.
'Akai Ryu' (Red Dragon)
Instead of the usual green leaves with red-lined jaws, this one goes a deep maroon-red all over, foliage and traps and all.
'B52'
If you want big, 'B52' is your pick, growing some of the largest traps of any flytrap you can buy.
'Dente'
Rather than the long bristly teeth most flytraps have, 'Dente' rims its traps with short, triangular little spines.
How to propagate
Want more flytraps? You can split a clump, root a leaf, or grow from seed. Splitting is quick and easy, while seed is the long haul that takes a few years of patience.
DivisionModerate
Early spring, during or just after dormancy when repotting · Several weeks to a few months
The easiest way to get more flytraps is to split a clump in early spring, during or just after dormancy, right when you're repotting anyway. Gently tease the offsets apart so each one keeps its own roots and growth point, then pot them up in carnivorous mix. They'll settle in over several weeks to a few months.
Leaf cuttingsModerate
Spring to early summer during active growth · About 1-3 months for plantlets to form
Try leaf cuttings in spring or early summer while the plant's growing hard. Gently pull off a whole leaf with a bit of the white rhizome base still attached, lay it flat on damp media, and keep it bright. Little plantlets will pop up from the base over about 1 to 3 months.
SeedDemanding
Sow after cold-moist stratification in late winter to spring · 3-5 years to reach mature size
Growing from seed is the slow road, so pack your patience. Sow in late winter or spring after a cold-moist stratification to break dormancy. The seedlings come up fine, but they take 3 to 5 years to grow full-size traps, which is why most people just go with a division.
Myths
A flytrap will happily take a bit of raw burger or chicken.
Meat's just too fatty and rich for a flytrap, so it rots inside the trap and turns it black. This plant evolved to eat insects and spiders, and it catches those just fine on its own.
Flytraps are tropical, so they've got to stay toasty year-round.
Nope, they're not tropical at all. They're temperate bog plants from the Carolinas, and they need a cold winter dormancy of 3 to 4 months to last more than a season or two.
Tap water does the job just fine for a flytrap.
The minerals and salts in tap and bottled water pile up in the soil and slowly poison the roots. So use only distilled, reverse-osmosis, or rainwater, and nothing else.
You've got to hand-feed a flytrap or it won't pull through.
Give it full sun and a flytrap makes its own food and catches plenty of bugs without any help from you. Hand-feeding is optional and never required, and going overboard with it just wears the traps out.