Aromatherapy for Horses: Which Essential Oils Can I Safely Use for My Horse?

By Caryn Gehlmann, Clinical Aromatherapist

I love it when I get questions about how to safely use essential oils. This means you’re doing your homework! You realize that even though essential oils are natural, they can cause harm if you’re not using them safely. And that’s true with animals as well as humans. This Q&A with Caryn will focus on how to safely use aromatherapy for horses.

Holly recently reached out to me with this question:

“I read a post that citronella oil is bad for horses, as it causes hypersensitivity to sunlight and can cause skin cancer. Is this true? And what essential oils are safe for horses?  During the very hot summer months, when the ticks are not as bad, I like to use a DIY essential oil spray to control flies on the horses. I find without it, riding simply is not a pleasant experience.”

Great question! Citronella essential oil is commonly used as a natural insect repellent for both humans and animals, including horses. While some essential oils are safe for horses, their powerful properties mean that they must be used correctly to avoid potential harm. Below I share safety considerations, recommended essential oils, and application guidelines when you want to use essential oils for your horse.

Safety Considerations When Using Essential Oils for Your Horse

Dilution: Essential oils, including Citronella, should never be applied to the skin, whether human or animal, in their undiluted form. Undiluted topical application may cause skin irritation or even be toxic. Specific to horses, it’s recommended to dilute the citronella oil in a carrier oil (such as coconut or olive oil) before application. I recommend starting with a low ratio of essential oil to carrier is best, so -1-3% essential oil to 97-99% carrier oil.

Sensitivity: Just like humans, horses can have individual sensitivities or allergies to specific substances, including essential oils. Watch for any signs of irritation or allergic reaction. Get more recommendations for a horse expert in our blog Energy Worker Safely Uses Essential Oils for Horses.

Inhalation and Ingestion: Aromatherapy for horses is very effective if you make sure the horse does not inhale concentrated essential oils and never ingest them, as this can lead to respiratory or gastrointestinal issues. The times I have worked with horses and trainers during classes, the trainer would hold a bottle of essential oil in her hand with her fingers surrounding the bottle of essential oil (cap off, but orifice reducer still in) and waft it back and forth, not too close to the horse’s nostrils. The horse will immediately respond by turning away or coming a little closer. Or if they really like the scent they will put their mouth over the trainer’s fist! Always honor your horse’s choice!

Quality of Oil: The quality of essential oils vary greatly. Please use essential oils that have been tested to ensure quality. For example, use pure Citronella essential oil without contaminants or additives that could be harmful to your horse.

Professional Advice: It’s a good idea to consult with a veterinarian or an equine specialist before using citronella or any essential oils on your horse, especially if your horse has known health issues or sensitivities. They can provide guidance on safe practices and alternative options if using it specifically for insect repellent.

Regulatory Considerations: If you’re involved in competitive riding or racing, it’s also wise to check if there are any regulations or restrictions regarding the use of essential oils on horses, as some organizations may have specific rules about what substances are allowed. I have known in the past that Lavender was not to be used.

So to answer the question, yes, Citronella essential oil can be used as a natural insect repellent for horses. But it must be done with caution, proper dilution, and consideration for the individual animal’s health and sensitivity.

List of Essential Oils Generally Considered Safe for Horses

Please note, that all of these essential oils must be applied using safety guidelines.

• Lavender – Known for its calming and soothing properties, lavender can be beneficial for horses experiencing stress, anxiety, or needing help with relaxation. Learn more about all the ways you can use our Love Your Pet Lavender hydrosol in our blog Hydrosols for Pets — The Safest Aromatherapy Option.
• Chamomile, Roman – Useful for relaxation and may help with skin irritations.
• Peppermint – Often used for its digestive and respiratory benefits, as well as being invigorating and stimulating.
• Eucalyptus – Commonly used for respiratory health, helping to clear nasal passages and support overall respiratory function. Get more suggestions in our blog Eucalyptus Essential Oils for Dogs & Horses.
• Tea Tree – Known for its antiseptic properties, can be beneficial for skin issues but should be used with caution and highly diluted.
• Frankincense – Often used for its calming effects and to support the immune system.
• Lemongrass – Like Citronella, this has insect-repellent properties and can be uplifting.
• Rosemary, ct cineole – Can help with circulation and muscle relaxation, but should be used with caution as it can be stimulating. Make sure to choose the right kind of Rosemary, I would not recommend ct. camphor or ct verbenone.

Application Guidelines When Using Aromatherapy for  Horses

Patch Test: Before applying an essential oil blend to a larger area, conduct a patch test on a small skin area to ensure there is no adverse reaction. Remember, always dilute with a carrier before applying!

Application: Essential oils can be applied topically (after dilution), but make sure to avoid sensitive areas like the eyes, nose, and genital regions. You can also use oils in a diffuser in the horse’s environment, or added to grooming products.

Essential oils can be a great addition to your horse’s care regimen, but it’s crucial to use them safely and responsibly. I believe it’s always best to err on the side of safety. As always, we invite you to share your specific concerns with our staff of trained aromatherapists. If you have questions, feel free to contact us via the website. And be sure to sign-up for our newsletter with more essential oil tips the whole family (including your animals!) can enjoy and for a 20% coupon off your next order.

Photos by Philippe Oursel and  Lucie Hošová