Lavender is mildly toxic to dogs. The ASPCA lists lavender (Lavandula angustifolia) as toxic to dogs, cats, and horses, citing two naturally occurring compounds in the plant as the reason: linalool and linalyl acetate. The good news is that lavender is unlikely to cause serious harm. Most dogs that nibble on a lavender plant experience mild gastrointestinal upset rather than a medical emergency.
What Makes Lavender Harmful
Linalool and linalyl acetate are found throughout the lavender plant, concentrated most heavily in the flowers and leaves. These compounds give lavender its distinctive scent. In dogs, they irritate the digestive tract and can cause nausea, vomiting, and loss of appetite. The reaction is dose-dependent, meaning a dog that eats a small amount of plant material will generally have milder symptoms than one that consumes a large quantity.
There is no well-established toxic dose for lavender plant material in dogs. Veterinary literature doesn’t cite a specific number of leaves or flowers that crosses a danger threshold. In practice, most cases involve mild symptoms because dogs rarely eat large amounts of lavender. The bitter taste and strong aroma tend to discourage them from going back for more.
Symptoms to Watch For
The most common signs after a dog eats lavender include:
- Nausea and vomiting: Often the first and most noticeable sign, typically appearing within a few hours of ingestion.
- Loss of appetite: Your dog may refuse food or seem uninterested in treats for a day or so.
- Drooling or lip-licking: Signs of nausea that may appear before vomiting.
These symptoms are usually self-limiting, meaning they resolve on their own once the plant material passes through the digestive system. If your dog vomits repeatedly, seems lethargic, or shows symptoms lasting more than 24 hours, contact your vet.
Lavender Essential Oil Is a Bigger Concern
The plant itself is a mild irritant, but lavender essential oil is a more concentrated risk. Essential oils pack the same toxic compounds into a much smaller, more potent form. According to VCA Animal Hospitals, just a few licks of essential oil or a small amount on the skin could be harmful to a dog, depending on the product and the type of exposure. Dogs that ingest essential oils can develop more serious symptoms including difficulty breathing, muscle tremors, and weakness.
Diffusers are worth considering too. When you run a lavender oil diffuser, tiny oil droplets disperse into the air and can settle on your dog’s fur, which they then lick off during grooming. Dogs with pre-existing respiratory conditions like asthma or brachycephalic breeds (pugs, bulldogs, French bulldogs) are especially sensitive to airborne essential oils. If you use a diffuser, keep it in a room your dog can freely leave.
The Plant vs. Lavender Products
Not all lavender exposure carries the same risk. Here’s how different forms compare for dogs:
- Live lavender plant: Mildly toxic if eaten. Having lavender in your garden is generally fine as long as your dog isn’t actively grazing on it. Most dogs ignore it.
- Dried lavender: Same compounds as the fresh plant, slightly more concentrated. Sachets, potpourri, or dried bundles pose a mild risk if chewed apart and swallowed.
- Lavender essential oil: Significantly more concentrated and more dangerous. Keep bottles stored out of reach and avoid applying undiluted oil to your dog’s skin or coat.
- Lavender-scented products: Candles, sprays, and cleaning products contain synthetic fragrances or very diluted lavender. These are generally low-risk but can irritate sensitive dogs.
Keeping Your Dog Safe Around Lavender
You don’t necessarily need to rip lavender out of your garden. The plant’s mild toxicity level means casual contact, like brushing past a lavender bush or sniffing it on a walk, poses no real danger. The risk comes from ingestion, so the main question is whether your particular dog is a plant chewer.
Puppies and dogs that habitually chew or eat plants are the ones most likely to have a problem. For these dogs, placing lavender in raised beds, behind fencing, or in areas your dog doesn’t access unsupervised is a practical solution. If you’re planting a new garden with a plant-chewing dog in mind, choosing non-toxic alternatives like rosemary or sunflowers eliminates the concern entirely.
If your dog does eat lavender, note roughly how much they consumed and watch for vomiting or appetite changes over the next 12 to 24 hours. For a small nibble with no symptoms, you’re likely in the clear. For larger amounts or if you’re unsure what your dog ate, calling the ASPCA Animal Poison Control Center (888-426-4435) gives you access to toxicologists who can assess the situation over the phone.