Coreopsis Toxic?

Updated 2026-03-06| 4 min read| 2,813 found this helpful
Coreopsis spp.
1

Coreopsis species are verified non-toxic to cats, dogs, and horses per plant toxicology databases.

2

No adverse health effects are expected from casual contact or accidental ingestion of small amounts of Coreopsis plant material.

3

Clinical intervention is rarely required unless an animal has unusual sensitivity or consumes extremely large quantities of the plant.

FAQ

Is Coreopsis toxic to Humans?

No documented toxic effects; mild temporary gastrointestinal upset may occur only if extremely large quantities are consumed. (Non-toxic)

Is Coreopsis toxic to Cats?

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption. (Non-toxic)

Is Coreopsis toxic to Dogs?

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption. (Non-toxic)

Is Coreopsis toxic to Horses?

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption. (Non-toxic)

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Toxicity Details

Humans
Non-toxic

No documented toxic effects; mild temporary gastrointestinal upset may occur only if extremely large quantities are consumed.

Cats
Non-toxic

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption.

Dogs
Non-toxic

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption.

Horses
Non-toxic

No known toxic symptoms; very mild transient digestive discomfort may occur in rare cases of overconsumption.

Toxicity Snapshot

Toxic PartsNo parts of Coreopsis are considered toxic to cats, dogs, or horses under normal exposure conditions.
Exposure RouteNo toxic exposure routes confirmed; ingestion, skin contact, or pollen exposure do not trigger toxic reactions in tested species.
Toxic CompoundsNo toxic phytochemicals have been identified in Coreopsis spp.

First Aid & Prevention

First 30 Minutes

  • • If small amounts are ingested, rinse the mouth of the exposed individual/animal with clean water.
  • • Wipe any plant residue off skin or fur to prevent potential mild allergic reactions in sensitive subjects.
  • • Offer small sips of fresh water to reduce risk of minor digestive irritation if large volumes were consumed.

Contact Vet Immediately

  • • Persistent vomiting, diarrhea, or lethargy occurs within 24 hours of ingestion
  • • The exposed animal has a documented history of severe plant allergies
  • • Extremely large quantities of the plant were consumed by a small, juvenile, or immunocompromised animal

Prevention

  • • Keep ornamental plants out of reach of young pets that exhibit excessive chewing behavior
  • • Monitor sensitive animals for signs of allergic reaction after first exposure to Coreopsis
  • • Avoid planting Coreopsis in high-traffic grazing areas if animals have a history of uncontrolled overconsumption of ornamental plants

Treatment & Prognosis

  • • Supportive care only for rare cases of mild digestive upset
  • • Antihistamines may be prescribed for confirmed allergic reactions
  • • No specific antidote is required as no toxic compounds are present in the plant
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Professional Toxicology

Scientific NameCoreopsis spp.
AliasesTickseed
Toxicity Grade
HumansNon-toxic
CatsNon-toxic
DogsNon-toxic
HorsesNon-toxic
Target Organs
No organs are targeted by toxic compounds from Coreopsis exposure
Mechanism of Action

• No toxic mechanism identified, as Coreopsis spp. do not produce phytochemicals harmful to mammals

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: No documented toxicity; mild digestive upset possible only with excessive overconsumption.
Sheep: Non-toxic; no adverse effects reported from normal grazing exposure.
Domestic Rabbits: Non-toxic; safe for consumption as part of a balanced forage diet.
Confusion Risk

The following plants look similar and may be confused:

Common Ragwort Jacobaea vulgaris
Has similar bright yellow composite flowers to Coreopsis; key difference is ragwort has deeply lobed, ruffled leaves, and is highly toxic to livestock, unlike Coreopsis.
Canada Goldenrod Solidago canadensis
Has similar tall stems and clusters of small yellow flowers; key difference is goldenrod flowers grow in dense spikes along upper stems, while Coreopsis flowers grow singly on long stalks.
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Related Toxic Plants

Common Ragwort
Common Ragwort
Jacobaea vulgaris
Highly Toxic
Florist's Chrysanthemum
Florist's Chrysanthemum
Chrysanthemum × morifolium
Low to Moderate Toxicity
Common Groundsel
Common Groundsel
Senecio vulgaris
Moderate Toxicity

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Data Sources

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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