Cats & Dogs
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
Pet safety reference
Lemon
Citrus limonia
The lemon tree is a popular citrus plant known for its fragrant blossoms and acidic fruit. While often grown for culinary use, all parts of the plant contain essential oils and psoralens that can cause adverse reactions in pets.
Citrus limonCitrus limoniaLemon Tree
- Light
- Bright direct light
- Habit
- Upright shrub or small tree
- Care
- Moderate
Safety status
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Cats — concern notes
Common signs
Drooling, vomiting, diarrhea, and potential skin irritation upon contact.
Escalation note
Ingestion of plant parts or essential oils can cause gastrointestinal upset and photosensitivity. Please contact your veterinarian if your cat has ingested any part of this plant.
Dogs — concern notes
Common signs
Vomiting, diarrhea, lethargy, and signs of skin irritation or sensitivity.
Escalation note
The essential oils and compounds in the plant can lead to digestive distress and skin issues. Always consult a veterinarian if you suspect your dog has consumed or been exposed to the plant.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
Lemon is toxic to cats and dogs due to essential oils and psoralens.
NC State Extension Plant Toolbox
botanical · 94% reliability
Citrus limon is a small evergreen tree widely cultivated for its fruit.
Questions about Lemon
Is lemon toxic to cats?
Yes, lemons are toxic to cats. All parts of the plant — leaves, peel, fruit, and blossoms — contain essential oils and psoralens that can cause gastrointestinal upset and skin irritation. The ASPCA classifies lemon as potentially toxic to cats.
What symptoms will my cat show after eating lemon?
The most common signs are drooling, vomiting, diarrhea, and depression. If peel oil contacted the fur or skin, your cat may also develop skin irritation or dermatitis. Concentrated essential-oil exposure can additionally cause tremors, loss of coordination, low body temperature, and respiratory distress.
What should I do if my cat ate part of a lemon tree?
Move your cat away from the plant and wipe any peel oil off the fur with a mild dish soap to prevent further absorption during grooming. Rinse the mouth with water. Do not induce vomiting unless directed by a veterinarian or poison control. Call your vet or ASPCA Animal Poison Control at (888) 426-4435 if your cat ate a significant amount of peel or leaves, was exposed to lemon essential oil, or shows persistent vomiting, weakness, tremors, or breathing changes.
How long do lemon poisoning symptoms last in cats?
GI signs from chewing lemon leaves or peel typically begin within a few hours and resolve within 24–48 hours. Essential-oil exposure is more serious and can cause signs that take 3–7 days to fully resolve, so veterinary monitoring may be needed.
How long do lemon toxicity symptoms last in dogs?
GI signs from peel or leaf ingestion typically begin within a few hours and resolve within 24–48 hours. Exposures involving lemon essential oil can take 3–7 days to fully resolve.
Are lemons toxic to dogs?
Yes, lemons are potentially toxic to dogs. All parts of the plant — fruit, peel, leaves, and blossoms — contain essential oils and psoralens that can cause vomiting, diarrhea, lethargy, and skin irritation.
What symptoms will my dog show after eating a lemon?
The most common signs are vomiting, diarrhea, and depression. If peel oil contacted the skin, you may also see dermatitis in that area. Larger ingestions or exposure to lemon essential oil can cause more serious effects like weakness, unsteady walking (ataxia), and tremors.
What should I do if my dog ate a lemon?
Remove the lemon and, if peel oil got on the coat, bathe the area with mild dish soap. Offer fresh water but do not induce vomiting unless directed by a vet or poison control. Call your vet or ASPCA Animal Poison Control (888-426-4435) if your dog ate a large amount of peel or leaves, ingested lemon essential oil, or is showing ongoing vomiting, weakness, or wobbliness.
Often compared with
Commonly confused with
Same Citrus genus.
Bitter Orange
Citrus aurantium
Citrus aurantium is a citrus tree known for its fragrant flowers and bitter fruit, often used in essential oil production. It contains compounds that can cause adverse reactions if ingested by pets.
Potentially toxic for cats & dogs.
Same Citrus genus.
Lime
Citrus aurantifolia
The lime tree is a citrus species known for its aromatic foliage and fruit. While popular as a houseplant, all parts of the plant contain essential oils and psoralens that can be harmful to pets if ingested.
Potentially toxic for cats & dogs.
Same Citrus genus.
Grapefruit
Citrus paradisi
Grapefruit is a citrus tree known for its large, tart fruit and glossy, aromatic foliage. While popular in home orchards, all parts of the plant contain essential oils and psoralens that can cause adverse reactions in pets.
Potentially toxic for cats & dogs.
Same safety verdict
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