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Growing Carnivorous Plants That Eat Bugs

Anthony enjoys spending time in the workshop, kitchen, garden, and out fishing. Many of his DIY projects are featured in his yard.

Venus Fly Trap showing trigger hairs. Who wouldn't want a plant that eats spiders?

Venus Fly Trap showing trigger hairs. Who wouldn't want a plant that eats spiders?

An Intro to Growing Carnivorous Plants

Carnivorous plants appeal to hobbyists and aficionados for their interesting foliage and their unusual methods of extracting nourishment from the environment. Unlike plants with roots systems that thread through the soil in search of nutrients, carnivorous plants make their living on a diet of bugs.

Adapted to living in sunny bogs and swamps with moist and humid environments, carnivorous plants thrive in nutrient-poor soils where insects are plentiful. The leaves of carnivorous plants evolved into specialized insect traps for luring and capturing live prey—and then digesting their unfortunate victims to absorb the nutrition needed for survival.

Some plants specialize in attracting insects with sweet scents, targeting butterflies, moths and ants. Other types of carnivorous plants feed on flies, spiders and a variety of small bugs.

There are over 600 species of carnivorous plants found around the globe, though many are critically endangered from habitat destruction and over-harvesting from zealous collectors. Fortunately, carnivorous plants are easy to propagate and a wide variety of cultivated species are available for sale from reputable dealers and nurseries.

Plants Covered in This Article

  1. Venus Flytraps
  2. Sundews
  3. Pitcher Plants

Basics of Growing Carnivorous Plants

Caring for carnivorous plants requires providing sunshine and a moist environment. Many species of these interesting bug-eaters such as sundews and butterworts occur naturally in tropical or subtropical regions. Others, including the familiar Venus Fly Trap, live in more temperate regions. The hardy Pitcher plant thrives in northern areas, enduring cold winters of snow and ice through periods of dormancy.

In areas where the winters are mild, carnivorous plants can be grown successfully outdoors in specially prepared bogs. But for many enthusiasts, using containers makes it easier to grow plants in a sunny garden spot or on a deck during the warm summer months. Then as the cool fall approaches, simply move warm loving plants indoors to a sunny windowsill.

Some species of bug-eating plants such as Venus Fly Traps and pitcher plants require periods of dormancy during the winter months. Move these plants to a cool location where the temperature remains between 45 to 55 degrees Fahrenheit and allow the plant to rest. After a few months and as spring approaches, move the plant back to its sunny location.

Preparing the Terrarium

For beginning hobbyists, try setting up a terrarium. A variety of cultivated tropical and subtropical carnivorous plants will grow and thrive in a properly prepared terrarium.

Things You Need in Your Terrarium:

  • Terrarium
  • Gravel
  • Sphagnum moss
  • Coarse sand

Carnivorous plants extract nourishment from their captured victims rather than absorbing nutrients from the soil, and they will not survive in standard potting soil.

To make a terrarium for carnivorous plants, start by spreading a layer of gravel over the bottom of the container. The gravel layer allows the soil to drain while keeping the environment within the terrarium moist and humid.

Make the specialized soil mixture by combining two parts of sphagnum moss with one part of coarse sand. Thoroughly moisten the mixture before spreading the soil on top of the gravel, and then add the plants.

Watering Needs

When watering the plants, use rainwater or distilled water (available from supermarkets and drug stores). Tap water and even bottled water is often too high in minerals and contains other additives that can be toxic to the plants.

Water around the base of the plants and avoid splashing it on the leaves. In the environment of a terrarium, water droplets do not dry quickly from the surface of the leaves and can encourage fungus and diseases. Keep the terrarium moist and the humidity high but leave the top of the terrarium open to encourage air movement and of course, to allow flies and other small insects to visit. Sealing the top of the terrarium can cause mildew.

If growing carnivorous plants in pots, the Tray Method works well. Simply place the pot into a shallow tray, and add water to the tray. The plants will absorb water through the drainage holes of the pot.

Providing a Light Source

Carnivorous plants need a consistent source of light, either natural or artificial, but do not leave a terrarium in direct sunlight. The light intensifies quickly and creates heat within the closed environment of a glass terrarium, and the increased heat can burn and kill the plants.

Different species of carnivorous plants have different light requirements, and adjusting the lighting intensity may be necessary to encourage healthy growth. Most plants will thrive under bright but indirect sunlight or under a fluorescent light source designed for growing plants indoors.

Venus Fly Trap

Venus Fly Trap

1. Venus Flytraps

Scientific Name: Dionaea muscipula

Perhaps the most recognizable plant that eats bugs is the Venus Fly Trap. Lined with hair-like triggers, the pads of the Venus Fly Trap spring shut to trap ants, flies and other small insect prey. The pads cannot reach out to capture prey but lie in wait for an unsuspecting bug to crawl across the pad in their own search for food. The insect brushes against the hairs, triggering the fly trap's pads to snap shut around its meal. After digesting its meal, the pads then die and should be removed.

At the end of the annual growing season, move the Venus Fly Trap into a cool environment where the leaves and pads die back as the plant enters into its dormancy stage. Venus Fly Trap plants that are kept in a warm environment all year round will not go dormant and will grow weak and spindly over time.

Though inexpensive and commonly available, the Venus Fly Trap can be a challenging plant for beginning hobbyists to grow due to its dormancy requirements, or should be grown as annuals.

Sundew plant.

Sundew plant.

2. Sundew Plants

Scientific Name: Drosera

Resembling tiny pincushions, Sundew plants have spiky tentacles that extend out from the plant. A sticky drop of gel forms at the tip of each spike, and these little droplets give the appearance of morning dew glistening in the sunshine. The gel-like substance emits a sweet fragrance, attracting flies and other small insects to investigate. The unfortunate bugs that land among the sweet-smelling spikes in search of the food source quickly become stuck as if trapped by flypaper. As the Sundew's tentacles slowly embrace the captive critter, the hungry insect becomes the meal.

There are many varieties of Sundew plants available in a variety of shapes and colors. Most are from humid, tropical areas and will thrive in a properly prepared terrarium.

Northern Pitcher Plant

Northern Pitcher Plant

3. Pitcher Plants

Scientific Name: Sarracenia

These interesting plants hold a watery reservoir at the bottom of their vase-shaped leaves that forms a pitfall trap. The insides of the leaves are lined with downward-pointing hairs, making it difficult for a captured bug to climb back out of the plant after being lured into it by the fragrance of the sweet liquid at the bottom of the pitfall trap.

The unlucky bug quickly tires out and then falls down into the water to drown, and the Pitcher plant slowly consumes its meal.

How do you feel about plants that eat bugs?

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

Questions & Answers

Question: Why shouldn't we feed raw meat or hamburger to carnivorous plants?

Answer: The vitamin, mineral and protein structure of raw meat and hamburger is very different from little live insects. The carnivorous plants evolved to digest bugs, and they cannot absorb the essential minerals that they need from raw beef, pork chicken or other meats.

© 2011 Anthony Altorenna

Tell Us About Your Experience with Carnivorous Plants

BTS on February 09, 2018:

Love these plants

Paula Hite from Virginia on March 24, 2014:

Love your lens! It's been featured on out Facebook page today! Come and check it out!"The Green Thumb: A Place For Gardeners To Gather"

Snakesmum on January 28, 2013:

Fascinating lens. Although I haven't had success with venus fly traps in the past, I'd like to try again. Blessed

Maria Burgess from Las Vegas, Nevada on December 15, 2012:

These are great plants. I have seen Sun Dew plants in Florida and Pitcher plants in South Carolina. They are very fascinating little monsters! Great lens!

RationalHedonist on September 07, 2012:

Informative! My flytrap is beginning "winter mode", and starting to have smaller traps. My favorites are the sundews and pitcher plants.

anonymous on July 18, 2012:

Carnivorous plants are very interesting...not sure if I would be ready to try growing one anytime soon though. They make me think of the recent "Journey to the Center of the Earth" movie where the plants are attacking them!

anonymous on June 04, 2012:

Yup, was in the neighborhood and stopped to see the Venus Fly Trap eat that spider!

Einar A on May 01, 2012:

Very interesting plants indeed! I've never tried growing any, but have seen Jack in the Pulpit in the wild.

Renaissance Woman from Colorado on April 14, 2012:

Fascinating. I remember my uncle had a Venus fly trap plant when I was a child. It's the type of thing that sticks with you. There is just something mesmerizing about a carnivorous plant. I've always loved terrariums. Wouldn't mind caring for a few of these unusual plants, especially if they promise to keep my fly population under control. Thanks for another excellent article. *Blessed*

Lorelei Cohen from Canada on February 15, 2012:

My daughter chose Spike as the name for the Venus flytrap plant that I bought her. I love the carnivorous plants and think they are a great gift choice for college students who tend to have a rather warped sense of humor at the best of times.

anonymous on January 21, 2012:

Just had to stop back and watch that Venus Fly Trap dine once again!

anonymous on September 18, 2011:

I was surprised how quickly the venus fly trap closed up on the spider in the video, he didn't even know he was in trouble until it was too late. Another fascinating lens. Its interesting that carnivorous plants can be grown successfully in poor soil since they don't rely upon the soil but there insect food for nutrients...and no raw meat for them!

anonymous on September 08, 2011:

Beautiful lens and nice handy tips for growing these carnivores!