Calendula Oil and Pets: What Is and Isn't Known

A title that promises "safe uses" for pets implies there is a list of established uses to hand over, and there is not one. What exists is a toxicity rating for the calendula plant in dogs and cats, no rating at all for horses, and no dosing or efficacy data for calendula oil on any of the three. We make a calendula oil for people, so this page is a map of what is known and unknown, with the decisions left to a veterinarian.

Calendula oil bottle

Calendula Oil

Our own small-batch calendula oil, in sizes from 0.5 oz to bulk.

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What each species has behind it

AnimalWhat a published source saysWhat is missingWho decides
DogsASPCA rates Calendula officinalis non-toxic to dogsAny test of calendula oil on dog skin; any doseYour veterinarian
CatsASPCA rates it non-toxic to cats; veterinary toxicologists warn against concentrated essential oils on catsAny test of calendula oil on cat skin; any doseYour veterinarian
HorsesNo Calendula entry on the ASPCA horse listA rating of any kindAn equine veterinarian

The ASPCA entry for pot marigold reads "Non-Toxic to Dogs, Non-Toxic to Cats" and adds that eating any plant material can cause vomiting and stomach upset (ASPCA Animal Poison Control). It rates the plant, not oils or salves, and states that its lists are not meant to be all-inclusive. Pet Poison Helpline gives the same plant rating for dogs and cats and adds that French and African marigolds (Tagetes) are a different genus rated mildly irritating (Pet Poison Helpline).

Why you will not find a dosage here

The only dosing information we hold for calendula is for people, in the EU herbal monograph: semi-solid skin products equivalent to roughly 2-8% herbal substance for the olive-oil extract, applied two to four times daily, and not recommended for children under 6 because adequate data are lacking (EMA/HMPC, 2018). That is a licensed traditional-use framework for human medicines. The monograph does not extend to animals, and even for people it holds back where data are thin, as with children under 6. Reasoning from that, a dog or cat dose borrowed from a human leaflet would be a guess dressed up as a number, and body size and grooming habits are the very things that make such a guess risky.

Similarly, the cosmetic safety panel's concentration table for calendula flower oil (up to 0.1% in cosmetic use, per its 2010 assessment) is a figure for human cosmetics, and we could not verify how that panel defines "flower oil," so it should not be treated as a pet limit either (CIR quick reference table, 2017).

Horses: absence from a list is not an answer

ASPCA's dog and cat lists carry five Calendula officinalis entries (garden marigold, gold bloom, holligold, mary-bud and pot marigold), but its horse list has none, and a search of all three lists for Tagetes found no match (ASPCA horse plant list). Absence from a list is not evidence of safety or toxicity. For a horse, the honest status of calendula oil is "unrated in the sources we have," and the right person to ask is an equine vet, who will also know whether the skin problem you are looking at is something a topical oil should go near.

The three things that make pets different from people

  1. Licking. Pet Poison Helpline says for cats that oil can be absorbed through the skin or ingested when the animal grooms itself. That page is about essential oils, but the mechanism applies to anything on a coat: you should plan for the product to be swallowed. See our cats piece for the cat-specific caution.
  2. The skin problem itself. A UK veterinary charity says a suspected hot spot, an area of inflamed and infected skin, warrants contacting a vet straight away (PDSA, 2020). Skin that is sore enough for an animal to chew is a veterinary question first.
  3. Eyes. The Cosmetic Ingredient Review panel noted that calendula-derived cosmetic ingredients may be mild eye irritants in the tests it reviewed (Andersen et al., Int J Toxicol, 2010). That finding is about people's cosmetics, and we apply it to animals only as a precaution: keep oil away from an animal's eyes.

Mistakes the sources warn about

Two are worth naming because both involve a product that looks like the right one. The first is stepping from a mild oil to a concentrated one. Pet Poison Helpline reports that tea tree oil is the most common essential-oil poisoning it sees in dogs, and that owners often apply the concentrated oil with good intentions (Marshall, Pet Poison Helpline). Its point is that the concentration, not the intention, sets the risk; the same page says toxicity is not caused by the very low tea tree levels in dog shampoos.

The second is the wrong marigold. A product that says "marigold" may be made from Tagetes, which is rated mildly irritating to pets, rather than Calendula officinalis, and the marigold extract sold commercially as a lutein source is normally Tagetes (Kurniawan et al., Foods, 2026). The Latin name on the label settles it.

What we would do if we were choosing

Put the questions in this order. Is a vet already involved in the skin problem? If not, that is step one. If the vet suggests calendula, which product, what carrier, how much, and for how long? If you are shopping on your own for something to use around the home, does the label list essential oils or fragrance? We lay out a buyer's version of that screen in what to buy and what to avoid, and the dog-specific questions in common questions about calendula oil and dogs. For paws specifically, we have a separate post on a DIY paw balm.

Where our oil fits

We make one product: a calendula-infused oil for human cosmetic use. We extract calendula alone from dried, organically grown flowers and bring that extract into a carrier oil, adding nothing else, and each bottle carries a lot number so batch documentation can be requested. We have no veterinary data on the oil and no veterinarians on staff, so we do not recommend it for dogs, cats or horses. If an animal's vet does decide to use a calendula product and wants the documentation, email the lot number to [email protected] and ask for the carrier on the batch paperwork.

The plain summary is that the plant has a non-toxic rating in two species, the oil has no tested uses in any of the three, and "safe" is a conclusion your vet reaches for your animal, not one a plant list can reach for you.

Calendula oil bottle

Calendula Oil

Nature's Golden Botanical, bottled: small-batch calendula oil in sizes from 0.5 oz to bulk.

From $13.99

Shop Calendula Oil →

Sources & Further Reading