Marginated Tortoise Diet: Feeding Testudo marginata

Weeds, leaves and flowers, high in fibre and calcium, low in protein and sugar. Fruit rarely, vegetables sparingly, animal protein never.

The food list is the standard Mediterranean one. What sets this species apart is scale and origin. Testudo marginata is the largest tortoise in Europe, reaching around 35cm and 5kg, and it comes from higher, cooler mountain country than its relatives. Both facts change how you feed it in Britain.

The flared rear marginal scutes that give the species its name are the easiest way to identify an adult, spreading outward like a skirt. The carapace of a mature animal is almost entirely black with yellow highlights, and the scute above the tail is undivided.

Best food categories

Feed regularly: plantain, sow thistle, mallow, hawkbit, bristly oxtongue, nipplewort, hibiscus, viola and pansy, violet, calendula, campanula, corn salad, mint, thyme.

Rotate through: dandelion, clover, chickweed, nettle, bramble and blackberry leaves, kale, spring greens, watercress, rocket, chicory, endive, pak choi, rose petals, cornflower, nasturtium.

Sparingly: carrot, courgette, cucumber, bell pepper, and any fruit.

Never: dog and cat food, meat, mealworms, bread, dairy, peas, beans, pulses, tomato, spinach, cabbage, broccoli, cauliflower, parsley, potato, onion, garlic, avocado, rhubarb, buttercup, daffodil.

To check anything outside that list, the food checker covers 105 foods with verdicts for the Mediterranean group. The printable chart has the full version.

What size changes

A marginated tortoise eats considerably more than a Hermann’s over its life, and that has two consequences worth planning for.

The first is supply. A large adult can strip a small planted pen faster than it regrows. If you intend to feed largely on forage, which is the best approach for this species, you need either more growing area than you would for a smaller tortoise or a reliable source of dried material to fall back on. Growing your own tortoise food is worth reading before you commit to a planted run.

The second is that proportions do not change with size, only quantities. A bigger tortoise does not become more tolerant of fruit, protein or low-fibre salad. If anything the opposite applies, since the consequences of years of overfeeding accumulate in a heavier skeleton.

Growth rate deserves close attention here for the same reason. Fast growth in a species that gets this large places a heavy demand on calcium and vitamin D3 metabolism, and shell deformity in a large tortoise is not a cosmetic matter.

UK weeds and plants

Britain grows most of what this species needs. All fourteen foods in our regular band are UK-growable, which makes a planted outdoor pen genuinely realistic rather than aspirational.

Worth learning to identify: plantain, sow thistle, mallow, hawkbit, bristly oxtongue, nipplewort, dandelion, clover, chickweed and bramble. See best weeds for tortoises.

Worth planting: hibiscus, viola and pansy, calendula, campanula and violet, all of which establish readily and flower over a long season.

Standard cautions apply. Never pick from verges, sprayed lawns or anywhere slug pellets have been used, and grow garden centre plants on for several weeks before feeding the new growth, since they arrive pesticide-treated.

Seasonal feeding

Marginated tortoises come from mountainous parts of southern Greece, the Balkans and Italy, found at altitudes up to around 1,600 metres. That is cooler and more strongly seasonal country than most Mediterranean tortoise habitat, and it makes this species a reasonably good fit for British conditions.

In the wild the year has a clear shape. Spring brings fresh growth and the heaviest feeding. Summer dries the vegetation out, and dry plant matter becomes the main food rather than an emergency substitute. Winter means hibernation.

That summer detail matters. A marginated tortoise eating coarse dried material in July is not going short. It is doing what the species does, and it is getting exactly the slow-fermenting, low-digestibility intake its gut is built for. Resist the urge to keep offering lush green salad through the summer to compensate.

The daily pattern is worth knowing too. Wild marginated tortoises bask early to raise body temperature, then feed, retreat to shelter through the hottest part of the day, and emerge again in late afternoon. Digestion in tortoises depends on body temperature, so food offered when the animal is too cool to process it does no good. In Britain that means feeding in the morning once it has warmed up, rather than late in the day.

Feeding stops several weeks before hibernation so the gut can empty. See feeding before hibernation, and winter feeding if yours does not hibernate.

Supplements and hydration

Calcium and vitamin D3 are the pair that matter. Tortoises need calcium in quantity and D3 to absorb it, and D3 is synthesised from UVB rather than eaten. UVB does not pass through glass, so time outdoors or an appropriate lamp is required.

The black carapace is relevant here. It lets these tortoises absorb heat quickly in a cool mountain climate, which is part of why they tolerate Britain reasonably well, but it does nothing for UVB exposure. Warm is not the same as adequately lit.

Supplementation matters most between November and March, when the diet leans on shop-bought greens with a weaker mineral profile than forage. See calcium and supplements.

Water should be available at all times, with regular baths. The idea that tortoises rarely drink is wrong. See water and hydration.

On commercial food, dried herbs and flowers earn their place in winter, particularly for a large animal whose forage supply runs short. Pellets are contested, with manufacturers and the Tortoise Trust taking opposing views, and our guide to tortoise pellets sets out both.

For the group-level reasoning, including why fibre length matters as much as plant choice, see Mediterranean tortoise diet. Portioning is covered in how often to feed a tortoise, and the nutritional background is in tortoise diet.

Guidance here draws on the Tortoise Trust, the British Chelonia Group and published veterinary and field sources, checked as described in our sources and review policy. It is husbandry information rather than clinical advice, as set out in our veterinary disclaimer.

Last reviewed: September 2026.