Herbal Pet Hazards
Just because a plant/herb is safe for you to us, it's not necessarily safe to use for or around animals. In addition to the plant itself, herbal products like salves may be made with things that are not good for pets to ingest, which they will likely try to do by grooming. Other things, like essential oils, almost all of which need to be heavily diluted before human use, may be even more toxic to cats and dogs due to their smaller size. Before using any herbal product on an animal, consult a veterinarian, and look up the specific ingredients, even if they aren't listed here.
While it makes sense to do your homework before trying to treat your pet's ailment, it is also crucial to remember that your animals may also be indirectly exposed by smoke from burning herbs and incense, diffusion from oil diffusers, powders left out etc. Too many TikTok witches are burning pet-toxic plants around their cats and dogs. Stop it!
Cats and dogs are the most common household animals, so I will focus on those except where indicated. If you have any other free-roaming animals in your house, make sure you look up their specific needs.
Most lists of "pet-toxic plants" focus on ornamental and houseplants. There are far too many of these to list, so I will stick to plants that have use in herbalism and/or show up often in green witchcraft. The ASPCA maintains a large database of toxic and non-toxic plants to dogs, cats, and horses, which I recommend anyone with pets check: Toxic and Non-Toxic Plants
The toxicity of these plants is not equal across the board. Many of the ornamental plants are also toxic to humans, though not many of us are in the habit of chewing the foliage. Some will cause minor mouth and GI irritation, some will cause kidney failure in high doses, others are fatal with even small amounts. Carnations, for instance, are a mild GI irritant for animals, while castor beans are fatal in very small amounts (and to humans as well). Catnip is listed as toxic to cats because of its psychoactive effects, but nonetheless it is a popular and usually-safe ingredient in many cat toys -- remember, the dose makes the poison! It also depends on the part of the plant ingested and at what time in the plant's life cycle. Apple fruit is non-toxic, while the seeds are toxic if eaten in high enough amounts, and the stems and leaves are most toxic when they are in the process of wilting. Anything that is toxic to humans should also be avoided.
Some are particularly dangerous in essential oil form, like tea tree oil. If you have animals around, it is important to be aware of the hazards associated with anything you use in the environment, including in essential oil diffusers, as sprays (check your natural bug repellants and cleaning supplies!), as incense, burned in candle rituals etc. The ASPCA Animal Poison Control Center says that essential oil diffusers can be used in homes with pets (without pre-existing health conditions like breathing problems) as long as they are not used long-term or in small areas where animals may have greater exposure, are properly diluted (which you should be doing regardless of whether there are animals around, but you may need to dilute them even further, and make sure the carrier oil is pet-safe), and are located in a safe place where pets cannot knock them over. They also remind pet owners that animals have much more sensitive senses of smell than humans, and even if it is not directly harmful to their health, the scents can certainly make pets uncomfortable. [1]
The Pet Poison Helpline lists some symptoms of common essential toxicities in dogs and cats: Dogs Cats
For essential oil exposure, Cabbagetown Pet Clinic gives the following instructions:
"If the product was inhaled, take them into fresh air immediately.
If ingested, Do NOT induce vomiting or give them activated charcoal. This puts your pet at risk because essential oils can stick to the lungs and airway leading to lung inflammation or airway obstruction.
Put the product and packaging in a sealed bag and bring to the clinic or emergency hospital.
If your pet gets oil on its skin or fur, wash it off as quickly as possible using hand dishwashing soap." [2]
The ASPCA website linked at the beginning is a good tool, searchable by toxic/non-toxic to dogs, cats, and horses, and you can find information about the type and symptoms of toxicity for each entry.
Plant Groups to Avoid in General:
Amaryllidaceae (amaryllis and onion) family - amaryllis, daffodils, crocus, some false lilies, onion, garlic, chives etc
Apiaceae family (carrot) family - cow parsnip, poison hemlock, Queen Anne's lace, dogbane, parsley, lovage etc
Araceae (arum) family - jack-in-the-pulpit, skunk cabbage, lords-and-ladies, taro, wild calla lilies etc
Cannabidaceae (cannabis) family - marijuana, hops etc
Euphorbia (euphorb) family - poinsettia, many potted plants
Iridaceae (iris) family - iris, flag, gladiolus etc
Liliaceae (lily) family - true lilies,* leeks, tulips etc
Prunus (stonefruit) genus (leaves/stems/seeds esp in wilting) - peach, apricot, cherry etc
Solanaceae (nightshade) family - nightshades, tomatoes, eggplant, peppers etc
Plants with Toxicity to Cats and/or Dogs:
Aloe
African violet
Alyssum
Bamboo
Basil
Bay laurel
Black haw
Black walnut
Borage
Buckeye
Buckwheat
Buttercup
Carnation
Castor bean
Clover
Crocus
Daisy
Dock
Epazote
Eucalyptus
Fig
Figwort
Fleabane
Foxglove
Hawthorn
Hellebore
Holly
Ivy
Larkspur
Laurel
Lemongrass
Lobelia
Locust
Macadamia
Marijuana
Mayapple
Mistletoe
Morning glory
Nasturtium
Oleander
Oregano
Periwinkle
Peony
Prickly ash
Primrose
Purslane
Ragwort
Rhubarb
Shamrock
St Johns wort
Sweet pea
Tobacco
Yarrow
Yew
Essential Oils with Toxicity to Cats and/or Dogs:
Anise
Camomiles (all kinds)
Caraway
Cinnamon
Citrus
Clove
Juniper
Lavender
Lemon verbena
Lovage
Marjoram
Mint
Oregano
Pennyroyal
Pine
Tarragon
Tea tree
Wintergreen
Ylang ylang
*There are a lot of common ornamental and houseplants with the common name of 'lily.' Most of these are not true lilies (genus Lillium); however, they are pretty much all toxic. If it has 'lily' in the name, it's probably a safe bet that your pets should not eat it. You probably shouldn't eat it, either, but I'm not the boss of you.
Sources
https://www.aspca.org/news/essentials-essential-oils-around-pets
https://cabbagetownpetclinic.com/2020/03/02/how-essential-oils-can-affect-your-pets-health/














