Horsfield’s Tortoise Diet: What to Feed a Russian Tortoise in the UK

Weeds, leaves and edible flowers, high in fibre and calcium, low in protein and sugar, and considerably less of it than most owners offer. No fruit.

That last point about quantity is the one that separates this species from the rest of the Testudo group, and it is the reason so many Horsfield’s tortoises sold in Britain do not reach ten years old.

Horsfield’s, Horsefield, Russian: all the same tortoise

Testudo horsfieldii collects more names than any other pet tortoise. Horsfield’s tortoise is the correct English name, after the naturalist Thomas Horsfield. “Horsefield” is a common misspelling, and it is so widespread in the UK trade that many owners never see the right version. Pet shops usually label them Russian tortoises, which is a trade name rather than a description of where they come from.

Scientifically it is also called the Central Asian, steppe, Afghan or four-toed tortoise. The wild range runs from the Caspian Sea through Iran, Afghanistan and Pakistan and east across Kazakhstan into western China.

All of these refer to one species with one set of dietary needs, so any advice you find under any of those names applies to your animal. The four claws on each front foot are the quickest way to confirm you have one, as the species identification table explains.

Why this species is different

A Horsfield’s tortoise is not really a Mediterranean animal. It comes from continental desert and steppe, and its whole physiology is built around a very short window of food.

In much of its range the species is active for around three months of the year, typically March through May. It brumates through winter and aestivates through the summer drought. Fieldwork by Lagarde and colleagues found that a wild steppe tortoise may feed on no more than ninety days out of three hundred and sixty five, and even then spends only about fifteen minutes a day grazing.

That produces an animal programmed to eat hard and store fat whenever food appears. Put it in a British garden with a bowl refilled every morning and the adaptation works against it. The Tortoise Trust’s account of captive care for this species lists the consequences plainly: excessive growth leading to metabolic bone disease, obesity with fatty infiltration of the liver and heart, renal problems and bladder stones from raised serum urea, and early death.

Wild growth is extremely slow. Females of nine years old are reported as only slightly over 10cm. If your juvenile is growing faster than that, the diet is doing too much.

The practical conclusion is uncomfortable but worth stating. With this species, feeding less of the right thing matters as much as choosing the right thing.

Best foods for a Horsfield’s tortoise

The wild diet takes in more than 80 plant species across 27 families, so variety is the aim rather than a fixed shopping list.

Feed regularly: plantain (Plantago spp.), sow thistle, mallow, hawkbit, bristly oxtongue and nipplewort. For flowers, hibiscus, viola and pansy, violet, calendula and campanula. Corn salad, sold as lamb’s lettuce, is the one supermarket green that stands up to frequent use.

Rotate through, not daily: dandelion, clover, chickweed, bramble and blackberry leaves, nettle. From a shop, kale, spring greens, watercress, rocket, chicory, endive and pak choi.

Occasional and small: courgette, bell pepper, cucumber. These add water and bulk rather than nutrition.

Dandelion deserves a note, since every other site treats it as the staple. It is a good plant and worth picking, but it is a diuretic and carries oxalates, so it belongs in the rotation band rather than the daily one.

Grass is not a Horsfield’s food in any meaningful quantity. They will take a little, but their gut handles the silica in grass poorly, and anyone applying Sulcata feeding advice to a Horsfield’s has the wrong animal in mind.

For identification and picking, see best weeds for tortoises. To check something specific, the food checker gives a verdict for the Mediterranean group, which is where this species sits.

Foods to limit and avoid

Never: dog food, cat food, meat, mealworms, boiled egg, cheese, bread, peas, beans, pulses, tomato, spinach, cabbage, broccoli, cauliflower, parsley, avocado, rhubarb.

Sparingly at most: carrot and other root vegetables.

No fruit. This is not a preference, it is a habitat argument. Arid-zone species did not evolve eating sugar, and the Tortoise Trust considers fruit entirely inappropriate for desert tortoises. Apple, banana, strawberry, grape and melon all fall under this. If you want the reasoning, can tortoises eat fruit works through it.

Animal protein is the fastest route to permanent damage. A Horsfield’s will eat dog food enthusiastically. It will also develop shell deformity and kidney damage doing so. The full list with reasoning sits at tortoise foods to avoid.

One curiosity worth knowing: wild Horsfield’s tortoises do eat plants containing toxic compounds, apparently without harm, possibly because their slow fermentative digestion prevents a rapid absorption spike. That is not permission to test the idea in a garden. A wild tortoise picking one leaf among eighty species is doing something quite different from a captive one offered a bowl of the same plant.

A UK seasonal rotation

Britain gives this species a reasonable approximation of its natural feeding year, if you let it.

The Tortoise Trust’s approach is to plant an outdoor pen with an edible wildflower mix that flushes in spring and dries to coarse graze later in the season, providing no supplemental food at all. Tortoises kept that way hold a healthy weight without becoming obese.

Two housing points bear directly on diet. Continuous heating, day and night, keeps digestion running at full efficiency around the clock and is a major driver of accelerated growth. A diurnal temperature cycle matters, and this species tolerates overnight temperatures around 4 to 5 degrees perfectly well. And it is a genuine desert animal: cold and dry is survivable, cold and damp brings respiratory disease and fungal shell infection quickly.

More on the cold months in winter feeding, and on timing in feeding before hibernation.

Pellets and supplements

Calcium is not optional. Tortoises need it in quantity and need vitamin D3, synthesised from UVB, to use it. UVB does not pass through glass, so a windowsill contributes nothing. See calcium and supplements.

Pellets are a different question. Manufacturers present complete pelleted diets as the bulk of what a tortoise should eat. The Tortoise Trust disagrees firmly, arguing that mass-market pellets are far too high in digestible energy for a species already prone to overgrowth. For an animal whose main captive problem is eating too much of too rich a diet, that objection carries weight. Our guide to tortoise pellets sets out both positions.

Dried herbs, flowers and grasses are less contentious and genuinely useful in a British January. See dried tortoise food.

Hatchlings and adults

Hatchlings and juveniles carry the risk. This is where rapid growth locks in bone problems that cannot be reversed later, and where a diet of lettuce and fruit with a pellet on top produces the cases vets see.

Feed juveniles once a day, portioned so it clears in about twenty minutes, and weigh them regularly rather than judging by eye. A wide pale band of new growth around the scutes is a warning sign. See baby tortoise food and how often to feed a tortoise.

Adults tip the other way, into obesity. Fat accumulates visibly around the shoulders and hind limbs before it starts infiltrating organs. An adult that has been fed generously for a decade may look fine and be nothing of the sort.

Common questions

Can Horsfield’s tortoises eat fruit? No, not as part of the diet. Their natural habitat contains almost none.

Can they eat dandelions? Yes, in rotation rather than daily.

Can they eat lettuce and cucumber? In small amounts. Both are mostly water and contribute very little fibre, so they are filler rather than food.

How often should I feed? Daily for juveniles, daily or with a day skipped for adults, and less than instinct suggests. Rest periods from feeding are part of how this species stays healthy.

Why is my Horsfield’s always hungry? Because it evolved to gorge during a three-month window. Appetite is not a signal that it needs more.

Do they need a heat mat at night? No, and constant overnight heat contributes to the growth problems described above.

Feeding guidance here follows the Tortoise Trust, the British Chelonia Group and published veterinary sources, checked as set out in our sources and review policy. It is husbandry information rather than clinical advice. A tortoise with shell deformity, rapid growth, weight loss or an appetite change needs a reptile-experienced vet, as our veterinary disclaimer explains.

Last reviewed: September 2026.