Can tortoises eat potato?
No, potato is best left off a tortoise's menu. Most pet tortoises are herbivorous grazers built to eat a high-fibre, low-starch diet of weeds, leafy greens and flowers, and potato is essentially the opposite of that — starchy, calorie-dense and part of the nightshade family, which several plants tortoises should avoid also belong to.
Picked for your pet
Tortoise Feeding Kit
Komodo tortoise salad mix, hay cakes, a flower treat bar and calcium supplement for a balanced tortoise diet.
£20.49
Pettex Reptile Tortoise
Calcium-added tortoise substrate, 10 litres, for arid-habitat tortoises and lizards
£9.99
Komodo Tortoise Eco Terrain
Soil and sand substrate for arid tortoises, deep enough to burrow in, 10 litres
£9.99
Komodo Tortoise Leaf Mix
A 100G dried botanical leaf mix as a complementary treat for tortoises and other reptiles
£5.29
Why potato doesn't suit a tortoise's diet
A pet tortoise's digestive system is built around slowly fermenting large amounts of fibrous plant material, extracting relatively little energy from any single mouthful. Potato works against that entirely: it's dense in starch and low in the fibre a tortoise's gut relies on, which can disrupt digestion and contribute to weight gain over time if fed regularly.
Potato also belongs to the nightshade family, along with tomato leaves and stems, aubergine leaves and raw green potato skin, several of which contain compounds that can be genuinely harmful to reptiles in more than trace amounts. Even where the flesh itself isn't classed as toxic, it isn't nutritionally suited to a tortoise and there's little reason to include it.
Cooking potato doesn't meaningfully change this picture either. While cooking reduces some of the compounds found in raw green potato and its skin, it does nothing to add the fibre a tortoise's diet is built around, and a cooked potato is still dense in starch compared with the leafy, fibrous plants a healthy tortoise diet should be based on.
What can happen if a tortoise eats potato
A small accidental nibble of cooked potato is unlikely to cause an emergency, but potato fed regularly or in any real quantity can contribute to poor gut function, weight gain and an unbalanced diet over time, none of which show up as an immediate dramatic reaction.
Watch for a tortoise going off its food, showing unusually soft or loose droppings, or seeming lethargic after eating something it shouldn't have. None of these are specific to potato alone, but any of them lasting more than a day or two, or a tortoise that stops eating entirely, is worth a call to an exotics-experienced vet rather than waiting it out.
Tortoises are also generally slow to show that something is wrong, so a change in behaviour after eating something unsuitable can take a day or two to become obvious rather than appearing immediately, which is another reason it's worth erring on the side of caution with anything outside their normal diet.
What to feed instead
A varied mix of dark leafy greens, edible weeds like dandelion and plantain, and the occasional flower head far better matches what a herbivorous tortoise is designed to eat, offering the fibre and nutrient balance potato simply doesn't provide.
If you want to offer some variety beyond greens, look for vegetables genuinely suited to a tortoise's diet rather than reaching for whatever's in the kitchen, and check with a source experienced in reptile care, or your vet, before introducing anything you're unsure about.
More for your pet
Things we stock that owners commonly reach for here. Nothing on this page depends on you buying one.
Komodo Tortoise Fruit Mix
A fruit-based treat mix for tortoises, made from dandelion, aronia berries, strawberry and redcurrants
£5.29
Komodo Tortoise Food Salad Mix
A complete holistic tortoise diet flavoured to taste like fresh salad
£7.29
Komodo Tortoise Food Cucumber
A complete holistic tortoise diet in cucumber flavour, high in fibre
£7.29
Common questions
- Can tortoises eat potato skin?
- No, raw potato skin, along with green-tinged potato flesh, contains compounds from the nightshade family that can be harmful to reptiles, and it offers nothing nutritionally useful even where it isn't directly toxic. It's simplest to leave potato, skin included, off the menu entirely.
- Is sweet potato safe for tortoises?
- Sweet potato isn't part of the nightshade family, but it's still starchy and calorie-dense compared with what a tortoise's diet is built around, so it isn't a good regular substitute for potato either. Leafy greens and weeds remain the better everyday choice.
- My tortoise ate a small piece of potato by accident, what should I do?
- A single small accidental taste is unlikely to cause an emergency, so keep an eye on their appetite and droppings over the next day or two. If they go off their food, seem unwell, or you're at all concerned, contact a vet experienced with reptiles rather than waiting to see.
- What vegetables are good for a pet tortoise?
- Dark leafy greens and edible weeds such as dandelion, plantain and clover make up the bulk of a healthy tortoise diet, with the occasional edible flower for variety. What suits your tortoise best can depend on the species, so it's worth checking against species-specific care advice or a vet familiar with reptiles.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.