Is Lemon Tree Toxic to Cats?
Also known as: Lemon, Citrus limon · Citrus limon
What makes it toxic
Citric acid plus psoralens, limonene and other essential oils concentrated in the peel, pith and leaves. These irritate the digestive tract; cats process citrus oils poorly.
Warning signs to watch for
Drooling, lip licking, vomiting and diarrhea within hours. Eating a lot of peel or leaves can add weakness, tremors or skin irritation from psoralen photosensitization.
What to do if your cat eats it
Rinse the mouth, remove access to the tree or fruit and offer water. Call your vet if vomiting continues, if a large amount of peel was eaten, or if tremors or weakness appear.
Common questions
Can a cat eat lemon fruit?
No. The sour juice and oils cause vomiting and drooling, and most cats refuse it on smell alone — which is why lemon scent is even used as a cat deterrent.
Is lemon essential oil dangerous to cats?
Yes, much more than the fruit. Cats cannot metabolize its terpenes, and exposure to concentrated oil on skin or fur can cause drooling, wobbliness and liver stress. Never apply it to a cat.
Are orange or lime trees different?
All citrus trees carry the same class of irritants. Treat lemon, lime, orange and grapefruit trees with the same caution.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.