Cats eat plants — it is one of the most common cat behaviours that plant-owning cat owners encounter, and one of the most frustrating. A cat that eats your plants is not misbehaving. It is expressing completely normal feline instincts. Understanding why cats eat plants is the first step to managing the behaviour effectively and providing safe alternatives that satisfy the underlying need.
Why Cats Eat Plants: The Four Main Reasons
1. Instinct and Digestive Aid
In the wild, cats consume small amounts of plant matter as part of normal digestive function. The primary purpose is mechanical: plant fibre helps move indigestible material — hairballs, bone fragments, feather material — through the digestive tract and out of the body. Grass-eating in particular causes vomiting in many cats, which is not a sign of illness but a deliberate mechanism for expelling matter that can’t be digested.
Indoor cats retain this instinct even without the practical need for it. When they chew on your houseplants, they are often just doing what feline digestive instinct tells them to do. This is not a problem that can be “trained away” — the instinct is biological. The answer is to provide a dedicated safe chewing outlet (cat grass) rather than trying to eliminate the behaviour.
2. Boredom and Enrichment-Seeking
Cats are predatory animals with significant cognitive needs. An indoor cat that does not have enough environmental stimulation will find its own activities. Houseplants are available, interesting (they smell, they move slightly, they have texture), and they produce a reaction from their owner — which itself becomes a form of stimulation. A bored cat chewing on plants is telling you it needs more enrichment, not necessarily that it has a specific interest in plants.
Signs this is the primary driver: the behaviour is worse when you are home (attention-seeking), the cat seems to prefer plants that are in prominent or high-traffic positions, and the behaviour reduces when you increase interactive play.
3. Nutritional Factors
Some cats eat non-food items including plants when something is missing from their diet. This is less common than the instinctual and boredom drivers but worth considering if the behaviour is excessive, persistent, or accompanied by other unusual eating behaviours.
If your cat chews plants obsessively and the behaviour does not respond to enrichment and cat grass provision, a dietary review with your vet is a worthwhile step. Some cats may benefit from dietary supplementation or a change in food formulation.
4. Stress and Anxiety
Changes in household routine, new pets or people, building work nearby, or other environmental stressors can increase plant-chewing behaviour. The physical activity of chewing provides sensory stimulation and may have a calming effect for anxious cats. The behaviour tends to appear or increase during periods of transition and reduce when the household stabilises.
If plant chewing has increased suddenly and coincides with a household change, addressing the underlying stressor — providing more hiding places, maintaining consistent routine, using Feliway diffusers — will often reduce the behaviour alongside other management strategies.
Deterrent Strategies That Actually Work
1. Provide Cat Grass
This is the single most effective intervention for most plant-chewing cats. Cat grass (typically Dactylis glomerata or Triticum aestivum) gives your cat a designated safe, appropriate chewing target that satisfies the digestive instinct driving most plant-eating behaviour.
Place a pot of cat grass in the same room as your other plants — proximity matters. Many cats will preferentially use the cat grass and largely lose interest in other plants. Grow it continuously (cat grass grows fast and needs regular replacement) and keep it fresh and green for maximum appeal. Cat grass seeds are inexpensive and widely available.
2. Citrus Peel Deterrent
Cats strongly dislike citrus smell. Orange, lemon, or grapefruit peel placed directly on the soil around plants deters most cats from approaching. Replace every three to four days as the scent fades. This is a low-cost, cat-safe, and reasonably reliable deterrent for plants you want to protect.
3. Physical Soil Barriers
Decorative stones, gravel, or large flat pebbles placed on the soil surface around plants serve two purposes: they prevent cats from digging in the soil (a related attraction) and reduce the overall appeal of the plant as an interaction target. A smooth gravel surface is less interesting to cats than accessible loose soil.
4. Bitter Spray
Pet-safe bitter apple spray applied to the leaves of plants deters chewing in most cats. Reapplication is needed every few days and after watering. Less effective for determined chewers but useful for occasional nibblers.
5. Strategic Placement
For plants you cannot bear to lose, hanging baskets, wall-mounted planters, or closed terrariums remove physical access entirely. Note that this only works reliably for non-toxic plants — if a plant is toxic, the safest solution is still to remove it rather than rely on placement barriers that a determined or athletic cat may overcome.
6. Increase Environmental Enrichment
If boredom is driving the behaviour, the most effective response is addressing the boredom. Daily interactive play sessions with a wand or feather toy, puzzle feeders, window perches for bird watching, and rotating toys all reduce a cat’s need to find its own entertainment. Many cat owners find that increasing enrichment substantially reduces plant-chewing behaviour without needing to move or protect any plants.
What Not to Do
Several commonly recommended deterrents are not safe for cats and should be avoided:
- Cayenne pepper — can cause eye and respiratory irritation in cats and is not an appropriate deterrent
- Mothballs — highly toxic to cats. Never use near plants or anywhere in a cat’s environment
- Essential oil sprays — many essential oils are toxic to cats (tea tree, eucalyptus, citrus) and should not be used near plants the cat can access
- Physical punishment — ineffective, damages the cat-owner relationship, and does not address the underlying drive
The Most Important Step: Remove Toxic Plants
All of the deterrent strategies above work better for non-toxic plants. For toxic plants, the most reliable protection is removal. Cats are motivated, creative, and patient. A barrier or deterrent that works today may stop working when the cat finds a new angle or when the deterrent fades. For plants that are genuinely dangerous — lilies, pothos, philodendrons, peace lily — removal is the only truly reliable approach.
Our plant database covers 119 ASPCA-verified safe plants with care guides and buy links, so you can find a safe alternative for every plant you need to remove.
Frequently Asked Questions
Is it bad for my cat to eat cat grass?
No. Cat grass is a safe and healthy plant for cats. It satisfies natural digestive instincts, provides enrichment, and may help with hairball management. Some cats will vomit after eating cat grass — this is normal and deliberate behaviour, not a sign of illness. Provide it continuously and let your cat eat as much as it wants.
Will my cat stop eating plants if I provide cat grass?
Most cats significantly reduce their interest in other plants when provided with dedicated cat grass. It is not a guaranteed 100% solution for every cat, but it is the most effective single intervention available. Combine it with the other deterrent strategies for best results.
Is it normal for cats to eat soil?
Occasional soil eating is common in cats, particularly if the soil contains organic matter or has an interesting smell from fertilisers. It is generally not harmful in small amounts but worth discouraging. Physical barriers on the soil surface (stones, gravel) and checking that fertilisers or soil additives are cat-safe are the main responses.
My cat only eats plants at night — is this different?
Cats are crepuscular — most active at dawn and dusk — and overnight behaviour is common. Night-time plant eating is more likely to be the instinctual/digestive driver rather than boredom or attention-seeking. Providing cat grass in the same room as your plants is the most practical response for nocturnal plant eaters.
