The 10 Most Dangerous Plants for Your Pet

You may be surprised at the number of very common plants—both indoor and out—that are toxic to pets. Check out our list of landscaping stalwarts that can make your furry friends seriously ill, or even worse, and then think about making a few quick changes to your garden.

  1. Azalea

    Azalea Poisonous

    One of the most ubiquitous—and beautiful—landscaping plants is also one of the most poisonous. The entire azalea plant is toxic to both dogs and cats, but it will also make horses, goats, and sheep sick. Eating just a few leaves could cause vomiting and diarrhea, and the long-term effects could be serious. So, if you have pets, pass on azaleas. If you already have them in your yard, you can opt to either remove the dangerous plant or keep an eye on your animals and take them immediately to the vet if you suspect they’ve chewed on one.

    Related: 15 Plants to Never Grow in Your Yard

  2. Daylily

    Daylilies Poisonous To Cats

    While they are not toxic to dogs, many types of lilies, including the daylily, are extremely toxic to cats. Small portions of any part of the plant, if ingested by a cat, can cause kidney failure. So, if your feline roams outside, you might want to reconsider planting lilies in your yard, and protect indoor cats by keeping tabletop floral arrangements lily-free.

    Related: 10 Foolproof Flowers Anyone Can Grow

  3. Hyacinth

    Hyacinth Toxic

    Hyacinth is loved for its lush early spring blooms and heady fragrance. Its bulbs, however, are poisonous. So, if your dog is a digger, steer clear of this and other early bloomers like snowdrops, crocuses, or daffodils.

    Related: Pet-Proof Your Yard with 5 Tips from a Pro Trainer

  4. Oleander

    Oleander Poisonous

    Oleander is a delightful outdoor evergreen that thrives in warm climates. Its delicate flowers come in many colors, from pink to red to white, and even yellow. Though lovely, those flowers and leaves are poisonous to both pets and humans. So, cultivate oleander only if you are confident that every member of your household can keep their hands—or paws—off the plant.

    Related: 10 Plants to Grow for a Pest-Proof Yard

  5. Castor Bean

    Castor Bean Plant Poison

    Castor-oil plant is a popular landscaping pick in public garden beds, loved for its colorful foliage, arresting seedpods, and the impressive height of its stems—all of which are toxic. Enjoy this plant when you see it in the city park, and avoid planting it in your own garden.

    Related: 10 Ways Your Backyard Can Hurt You

  6. Hosta

    Hosta Plant Poisonous

    Hostas are a go-to gardening staple for shady spaces, but they are poisonous to both cats and dogs. If you have a curious four-legged friend at home, try a pet-friendly shade plant like coral bells.

    Related: 20 Plants That Survive With or Without You

  7. English Ivy

    English Ivy Poisonous

    You may have already guessed that the berries of the very common English ivy are toxic to pets. But so is the rest of this vining plant—especially the leaves. Don’t be seduced by the charm of an ivy-covered brick wall. If you have ivy, get rid of it: It’s bad for the mortar and the dog.

    Related: 10 Accidents Waiting to Happen—and How to Stay Safe

  8. Yew

    Yew Poison

    Yew's many good qualities have made it an extremely popular evergreen landscaping shrub. It’s hardy and easy to grow, and it's attractive when flush with red berries. But the bark, leaves, and seeds of yew will affect the central nervous system of both dogs and cats if ingested. Horses are even more susceptible to poisoning if they munch on the shrub. Rather than risk the danger, it's probably best to eliminate yew from your property.

    Related: 10 Trees That Spell Trouble for Your Yard

  9. Elephant Ear

    Elephant Ear Poisonous

    In warm climates, elephant ear can be successfully grown in the garden, but throughout the rest of the country it is more commonly known as a popular houseplant. Beautiful though it is, the plant can cause swelling of the mouth, vomiting, and diarrhea in both animals and humans—reason enough for a cautious homeowner to avoid it.

    Related: 9 Bright and Colorful Houseplants You Can't Kill

  10. Morning Glory

    Morning Glory Poisonous

    The seeds of some species of morning glory contain lysergic acid, which is essentially a natural form of LSD. It can cause hallucinations, disorientation, tremors, and gastrointestinal problems in both dogs and cats. Avoid planting this vining plant if you own pets, and if it’s something that’s already on your property, make sure that those seed-containing flowers don’t get ingested.

    Related: 8 First Aid Supplies You Can Grow at Home

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