Are Zinnias Poisonous to Dogs?

The ASPCA classifies Zinnia species as Non-Toxic to Dogs (also non-toxic to cats and horses), with no toxic principles or clinical signs listed. Zinnias are a safe choice for dog-friendly gardens. Important caveats that still apply to any non-toxic plant: (1) Eating a large amount of plant material can still cause mild, self-limiting gastrointestinal upset such as vomiting or diarrhea, simply because the foliage is not part of a dog's normal diet and is hard to digest. (2) Stems, flower heads, or larger pieces can be a choking hazard or cause a GI obstruction in small dogs if gulped. (3) Garden-grown zinnias may carry residues that are the real danger — pesticides, herbicides, fungicides, slug/snail bait (metaldehyde), or systemic insecticides applied to the plant or surrounding soil can be toxic even though the plant itself is not. (4) Cut-flower bouquets may sit in vase water containing floral preservatives or bacteria; discourage drinking from the vase. (5) Fertilizers (especially bone/blood meal or those containing iron) in the planting bed pose a greater poisoning risk than the zinnia. If a dog eats a small amount of a clean, untreated zinnia, no treatment is generally needed; monitor for persistent vomiting and contact a vet if signs do not resolve.

Are zinnias poisonous to dogs?

No. The ASPCA lists Zinnia species as non-toxic to dogs (as well as cats and horses). There are no toxic principles or clinical signs of poisoning associated with the plant itself.

My dog ate zinnia flowers from the garden — should I worry?

The zinnia itself is not toxic, so it should not cause poisoning. Eating a lot of any plant can still trigger mild stomach upset (vomiting or diarrhea). The bigger concern is anything applied to the plant — pesticides, herbicides, slug bait, or fertilizer in the bed. If your dog only ate clean, untreated flowers, just watch for persistent GI signs; if it may have eaten treated plants or garden chemicals, call your vet or the ASPCA Animal Poison Control Center (888-426-4435).

Are zinnias safe to plant in a dog-friendly garden?

Yes. Because zinnias are ASPCA-verified non-toxic to dogs, cats, and horses, they are a good choice for pet-friendly gardens. To keep them fully safe, avoid spraying them with pesticides or applying toxic slug/snail bait or iron- and bone-meal-based fertilizers where your dog can reach the soil.

• ASPCA – Toxic and Non-toxic Plants: Zinnia

Last updated 2026-06-25