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Plant directory Venus Fly Trap

How to Grow and Care for Venus Fly Trap

Not many houseplants really live up to their name quite like the Variegated String of Hearts. Each heart-shaped leaf hangs from trailing vines, splashed with creamy white, soft green and blushing pink hues

By Victor Miller

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Published on June 19, 2025

Venus Fly Trap
Venus Fly Trap

In this article

Key Takeaways

  • Venus Fly Traps are carnivorous perennials that thrive in high humidity, full sun, and nutrient-poor, acidic soil.
  • Use only distilled, rain, or reverse-osmosis water - tap water can kill the plant due to mineral content.
  • They require a dormancy period during winter, where growth slows or stops; this is essential for long-term health.
  • Traps should not be fed human food; occasional live bugs are fine if grown indoors and not catching their own prey.
  • Blackened traps, yellow leaves, or lack of movement often point to improper care such as overwatering, poor lighting, or incorrect soil.
  • Venus Fly Traps are safe for pets, fun to observe, and can be a natural pest control solution with the right growing conditions.

"Ever seen a plant snap shut like a creature with a mind of its own?"

That’s the simple magic of the Venus Fly Trap (Dionaea muscipula), a carnivorous plant that has enchanted botanists, gardeners and curious minds for centuries. It’s native to the subtropical wetlands of the Carolinas in the U.S., and this plant lures, traps, and digests insects using its jaw-like leaves, which is one of the weirdest and most entertaining houseplants you’ll find.

Although it may look and act exotic, a Venus Fly Trap makes a superb houseplant once you learn its basic natural preferences. With the proper light, water and dormancy schedule, this living fly-catcher can flourish on your windowsill or on a balcony - while helping reduce the local bug population.

Botanical Name Dionaea muscipula
Common Name Venus Fly Trap
Type Carnivorous perennial
Height 5–7 inches
Sunlight requirements Full sun to bright light
Soil needs Acidic, nutrient-poor (peat-based)
Watering needs Distilled or rainwater only
Hardiness Zones 7–10
Time to Maturity 2–4 years

Plant Care

A Venus Fly Trap thrives when conditions closely mimic their natural boggy habitat: high humidity, moist soil, full sun, and nutrient deficient soil. Only use rainwater, distilled, or reverse-osmosis water —tap water with minerals can kill them. Plant them in a mixture of sphagnum peat moss and perlite (no fertilizers).

Keep them outdoors in summer if you can, where they’ll catch their own prey.  Inside, you can keep them near a sunny window, or use a grow light. They don’t need to be fed if they’re catching bugs on their own, though they can be offered live insects to eat once in a while.

During fall and winter, it needs to go dormant — leaf growth will slow or die back, but that’s pretty normal since the plant needs it for long-term health.

Light

Venus Fly Trap plants require a minimum of 6 hours of direct sun per day, and 12-14 hours under a strong grow light. Without sufficient light, they grew weak, floppy and may have lost their trap function. Keeping it outdoors is ideal, especially in summer. A south-facing window is ideal indoors.

Soil

These plants can only be grown in nutrient-poor, acid soil—never in regular potting mix.  A typical carnivorous plant mix contains peat moss and perlite or sand, with no added fertilizers. Soil should be kept consistently moist but not wet.

Watering

Water quality is critical. Use only distilled, rain or reverse-osmosis water. Keep the soil consistently moist, ideally with a shallow tray of water under the pot. Never let it dry out completely. Avoid watering from above; bottom-watering does a pretty good copy of their natural boggy habitat, and it also helps prevent rot.

Pruning

Venus Fly Traps do not require heavy pruning but a bit of trimming does help to maintain them healthy and appealing:

  • Best time to prune: Late winter or early spring, just before dormancy ends.
  • What to prune: Snip off blackened or dead traps at the base to minimize rot.
  • Remove: Old flower stalks (unless you are saving seeds) in order to preserve the plant’s energy.
  • Tip: Use clean scissors or shears to prevent spreading disease.

Bonus: Regular cleanup= better energy for healthy trap growth.

Propagating

Venus Fly Traps can be propagated by division or leaf cuttings:

  • Division: Divide young offsets (known as “pups”) from the base when repotting.
  • Cuttings: Take a healthy leaf with some of the white rhizome and put in moist sphagnum moss.
  • Maintain Moisture: Cover with a clear plastic dome or bag to retain moisture.

Wait: New plantlets will emerge in 4–8 weeks under bright, indirect light.

Growing in Pots

Venus Fly Traps are great for containers, especially when indoors:

  • Consider using plastic or glazed ceramic pots; these will prevent mineral buildup.
  • Make sure the pot is 4–6 inches deep to allow for root development.
  • Always pot with carnivorous plant mix and avoid fertilizers.
  • Use a tray system to maintain consistent moisture.
    • Rotate for even light exposure if grown indoors.

Overwintering

Venus Fly Traps require a dormancy period from late fall through winter.

Your traps will blacken and die back during this time, which is okay. Put them somewhere cooler, around 35 to 50 degrees Fahrenheit, reduce watering a bit (soil should remain just damp), and don’t feed them. Dormancy typically lasts 3 to 4 months, with new growth beginning in the spring.

Blooming

Venus Fly Traps may produce tall flower stalks in spring. Although the plant’s white flowers are pretty and fascinating, blooming requires a tremendous amount of energy. For young or weak plants, it’s best to snip off the stalk early to promote trap production instead.

Common Issues

Although they are tough in the right conditions, Venus Fly Traps are sensitive to improper care. Avoiding problems depends on knowing what to look for:

  • Black traps → Normal aging, but can also indicate rot from overwatering.
  • Traps not closing→ Frequently caused by repeated triggering or insufficient light..
  • Yellowing leaves→ Common with poor water quality or excess nutrients.
  • Mold → Typically from stagnant air or excessively wet conditions - improve ventilation.
  • No trap movement → Could be from dormancy, low temps, or lack of light.

Summary

A plant that feeds itself and snaps shut like a sci-fi creature?  The Venus Fly Trap is entertaining to watch and cool to grow. With proper soil, pure water and lots of sunshine, you’ll have a one-of-a-kind plant friend that also helps keep pests away naturally. Whether in your window or on your porch, this tiny carnivore will be the star of your plant collection.

FAQ

Do I need to feed my Venus Fly Trap insects?

Not if it’s outside or catching its own food. Indoors, you can feed it a small live bug every 2–3 weeks.

Can it eat human food?

No! Do not feed meat, cheese, or dead bugs - it can rot the trap.

How long do the traps stay alive?

Each trap closes and reopens a few times before dying. The plant continues to grow new ones.

Is it safe for pets?

Yes, Venus Fly Traps are non-toxic and not strong enough to harm pets.