18 of the Most Toxic Houseplants to Avoid If You Have Pets

Most gardeners know at least some of the plants in our backyards are toxic to dogs and cats. But it’s not just the azaleas you need to worry about. You might think the houseplants on your windowsills are safe. After all, how dangerous can a philodendron, pothos vine, or bird of paradise be? It turns out they’re pretty bad for your dog or your cat.

Check out 18 common houseplants that are toxic to cats and dogs.

1. Aloe

aloe in a pot

Aloe | iStock.com/ek_kochetkova

Many people keep an aloe plant in the kitchen or bathroom. It not only adds a decorative touch to a room, but also comes in handy if you need to soothe a burn. You can find hundreds of varieties of aloe plants. They range in size — in the wild, at least — from a few inches high to heights of 30 to 40 feet, according to Apartment Therapy. The most common, called an aloe barbadensis, is the kind you’ll usually see at Home Depot or Lowe’s. But the ASPCA reports aloe is toxic to both dogs and cats. And Barbados aloe is also toxic to cats and dogs.

Next: Asian lily

2. Asian lily

lilies

Lilies | iStock.com/Lindseycruz

The Asian lily makes a colorful appearance every year at Easter, when every home improvement and grocery store sells them in pink, orange, yellow, and white. Gardening Know How explains you can easily grow lilies in containers on your patio or balcony. (So there’s no need to throw them out once the blooms fade after spring has passed.) But think twice before buying one if you have a cat. The ASPCA reports the Asian lily is toxic to cats.

Next: Asparagus fern

3. Asparagus fern

Foxtail fern

Fern | iStock.com/hadkhanong_Thailand

Do you love lush, green plants? Then, you might be tempted to add the asparagus fern — which, for the record, isn’t a true fern — to your houseplant collection. Plus, Apartment Therapy recommends the asparagus fern for your bathroom, particularly if it gets plenty of sun. That’s because the asparagus fern thrives in warm, humid environments, unlike some of the other houseplants you might find at your local home improvement store. But a bathroom with an asparagus fern in it should probably stay off-limits to your pets. According to the ASPCA, the asparagus fern is toxic to dogs and cats.

Next: Begonia

4. Begonia

woman gardener smelling pink flowers in pot

A woman chooses flowers. | iStock.com/DeanDrobot

The begonia is a houseplant you’ve probably considered if your house or apartment is dark. Finding plants that tolerate the particular low-light conditions in your home can take some trial and error. As Apartment Therapy explains, “You will be sad if you try to grow succulents in the dark.” But begonias will work. They come in a variety of leaf colors and shapes. And begonias do well without direct light. The begonia looks small enough (and colorful enough) to be pretty harmless. But it’s not harmless to your pets. The ASPCA reports begonias are toxic to cats and dogs.

Next: Bird of paradise

5. Bird of paradise

Strelitzia flower in the greenhouse

Strelitzia in a greenhouse | iStock.com/telev_cat

The bird of paradise tops the list as far as statement-making houseplants go. Apartment Therapy reports this tropical tree “can grow quite large indoors and, if you’re very patient, reward you with stunning blooms within three to four years.” As MyDomaine explains, “This beauty can grow to more than 6 feet in height, and its banana-like leaves can reach 28 inches in length.” But you need to stay vigilant about this one if you have a cat or a dog at home. According to the ASPCA, the bird of paradise is toxic to dogs and cats.

Next: Branching ivy

6. Branching ivy

ivy in white pot

Ivy | iStock.com/paylessimages

Branching ivy, also called English ivy, makes an easy, low-maintenance houseplant. You might be most familiar with it growing on the outside of old buildings. But many people cultivate it inside, thanks to its air-purifying capabilities. According to Apartment Therapy, a NASA study determined English ivy numbers among the most effective plants when it comes to creating oxygen and filtering out common toxins from the air. But you should think twice about growing ivy at home if you have a pet. The ASPCA reports branching ivy is toxic to both dogs and cats.

Next: Caladium

7. Caladium

Elephant ear

Elephant ear | iStock.com/ananaline

Caladium, also referred to as elephant ears, makes a pretty dramatic statement as a houseplant or in your landscaping outdoors. According to Apartment Therapy, large-scale potted plants like elephant ears “can look great in a room that needs an empty space filled. Their size gives them a sculptural presence, and nothing brings life to a room like a lot of green.” However, you’ll want to skip this particular houseplant if you think the large leaves could become a target for a curious dog or cat. The ASPCA warns caladium is toxic to both dogs and cats.

Next: Catnip

8. Catnip

Cat mint

Cat mint | iStock.com/ junichi_arai

Think growing a catnip plant is a great idea for keeping your cat entertained? Think again. The ASPCA reports catnip is actually toxic to cats. “Many cats love catnip, but it can cause vomiting and diarrhea,” the ASPCA explains. “It makes some cats sedated and others stimulated.” American Humane adds, “Too much of the fresh plant can overstimulate the central nervous system and cause a cat to injure himself.”

Next: Cutleaf philodendron

9. Cutleaf philodendron

Monstera plant with white background

Monstera plant | iStock.com/mykeyruna

The cutleaf philodendron, also known as the ceriman and the Swiss cheese plant, is an of-the-moment houseplant everybody wants in their homes. As MyDomaine explains, “Its striking leaf shape is a beautiful addition to any interior, but the best part about the stylish species is that it actually thrives in low light, making it better suited to an indoor environment.” The plant will tolerate drought (or sporadic watering), as well. But the ASPCA reports this philodendron is toxic to dogs and cats.

Next: Cornstalk plant

10. Cornstalk plant

Shop for greenhouse cultivation and sale of indoor plants

Greenhouse | iStock.com/Panama7

The cornstalk plant — also called the corn plant, dracaena, dragon tree, or ribbon plant — makes a statement as a houseplant. As Apartment Therapy explains, this plant also lands on NASA’s list of houseplants that can effectively purify the air in your home. (In case you were wondering, NASA recommends having 15 to 18 “good-sized houseplants” in an 1,800-square-foot home.) You can find this particular plant pretty easily at your local Ikea or Home Depot — but pet owners might want to reconsider. The ASPCA reports the cornstalk plant is toxic to both cats and dogs.

Next: Fig tree

11. Fig tree

Green houseplant in flowerpot

Houseplant | iStock.com/robertsrob

The fiddle leaf fig has become an incredibly trendy houseplant to grow at home. But a plain fig tree — also called the weeping fig and the Indian rubber plant — grows well indoors, too. (Apartment Therapy reports you might even see fruit because the flowers don’t need to be pollinated. If that doesn’t make you want to grow one, we don’t know what will.) Just think twice about growing a fig tree if you have a pet at home. The ASPCA reports the fig tree is toxic to dogs and cats.

Next: Golden birds nest

12. Golden birds nest

Woman and snake plant

Snake plant | iStock.com/kolotuschenko

Many people love the golden birds nest — also called the snake plant, mother-in-law’s tongue, and good luck plant — because it looks dramatic but requires little maintenance. In fact, Apartment Therapy lists recommends it as a houseplant that’s hard to kill, even in low-light spaces. “It has a sculptural appearance, adds a bit of green, and seems to thrive on neglect,” the publication explains. As MyDomaine adds, “If you forget about it, don’t stress; these plants can go for a month without water.” But according to the ASPCA, the golden birds nest is toxic to cats and dogs.

Next: Golden pothos

13. Golden pothos

vine plant by window

Vine | iStock.com/andykazie

If you’ve ever grown a vine at home, chances are pretty good it was a golden pothos. (You might have also heard the plant called devil’s ivy, taro vine, and ivy arum.) These plants are incredibly easy to grow. Apartment Therapy notes pothos makes a stylish and dramatic addition to your decor. And MyDomaine reports that pothos always makes the list if you’re looking for houseplants you can’t kill. “This leafy vine is one of the easiest plants to grow, and grow it does. The tropical vine’s trail can reach up to 10 feet indoors, even longer in its natural environment.” But the ASPCA reports the golden pothos is toxic to dogs and cats.

Next: Jade plant

14. Jade plant

Money tree

Crassula ovata, commonly known as jade plant | iStock.com/princigalli

You can find the jade plant at just about any store that sells houseplants. (The plant sections at Home Depot, Lowe’s, and Ikea are all a good bet.) According to Apartment Therapy, the jade plant is a good match for those who are forgetful with the watering can. “Jade plants are cheery little succulents, fun to look at and easy to grow.” They also come in an array of different varieties, which all look different from one another. But be careful of this agreeable little plant if you have a pet at home. The ASPCA reports the jade plant is toxic to cats and dogs.

Next: Lemon tree

15. Lemon tree

Lemon trees with ripe fruits, decorating house exterior.

Lemon trees | iStock.com/AnikaSalsera

You can grow a lemon tree in a sunny corner of your home, and you can even put it out on the patio or balcony when the weather gets warm. (Apartment Therapy recommends placing citrus trees in a spot “where it gets lots and lots of light. If you take the time to pollinate the flowers, it will reward you with fruit, and no matter what it will smell fantastic.”)  But you should be careful about bringing one of these trees into your home if you worry about your cat or dog getting into the tree. According to the ASPCA, the lemon tree is toxic to dogs and cats.

Next: Octopus tree

16. Octopus tree

umbrella plant

Umbrella plant | iStock.com/suwanneeredhead

The octopus tree — also called the umbrella plant or the starleaf — numbers among the quintessential houseplants that you can buy in whatever size suits your space. You can get a tiny one to put on your desk. Or you can get a large one that will grow even larger if you give it adequate light and nutrition. According to Apartment Therapy, there are two species of umbrella plants, and they feature different-sized leaflets (and grow to different sizes outdoors). You can find variegated types of both species. And they do best in bright, indirect light. But according to the ASPCA, both species of the octopus tree are toxic to dogs and cats.

Next: Peace lily

17. Peace lily

White flower lily spathiphyllum houseplant in green leaves

Peace lily | iStock.com/Mandrixta

Many people love peace lilies for their white blooms, vibrant foliage, and air-cleaning capabilities. Apartment Therapy explains peace lilies land on NASA’s list of the best air-purifying plants, and they are easy to care for even in spaces with less-than-optimal light. They like indirect light and shade. And some even do well in offices with no windows and fluorescent lighting. But you’ll need to stay vigilant about your pets if you take one home. The ASPCA warns the peace lily is toxic to cats and dogs.

Next: Pencil cactus

18. Pencil cactus

pencil cactus

Pencil cactus | iStock.com/Linjerry

The pencil cactus, like many euphorbia, makes a photogenic and easy-to-care-for houseplant. Gardenista reports that “the pencil cactus owes its popularity both to its good looks and its hardiness.” You simply treat the plant like a succulent and err on the side of underwatering. But as with other kinds of euphorbia, you’ll need to be careful about these plants if you have a dog or a cat at home. According to the ASPCA, the pencil cactus is toxic to dogs and cats, thanks to its irritating sap. And if you do decide to grow one of the plants, you’ll need to be careful, as well. The sap is a skin and eye irritant for humans, too.

Read more: Pet Dangers! 15 Household Products That Can Kill Your Cat or Dog

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