Best UK Weeds for Tortoises

Six weeds can be fed in regular rotation to a tortoise in Britain. Another handful work well a few times a week. Almost all of them grow within walking distance of most British homes, and they cost nothing.

• Everyday weeds: plantain, sow thistle, mallow, hawkbit, bristly oxtongue, nipplewort
• Rotation weeds: dandelion, clover, chickweed, nettle, bramble and blackberry leaves
• Occasional only: vetch
• Never: buttercup

Why weeds matter more than anything you can buy

Three reasons, and they compound.

1. They are what the animal evolved to eat. Wild tortoises browse across roughly 200 plant species a year. Weeds are the closest captive equivalent.
2. The nutrition is better. Higher fibre, better calcium to phosphorus ratios, far less sugar and starch than cultivated greens.
3. They are the only category that scores well. Weeds and flowers between them supply eleven of the fourteen foods rated suitable for regular feeding in our records. Vegetables supply none. Fruit supplies none.

There is also a supply argument. Twelve of the thirteen weeds in our database grow in Britain, against two of the sixteen leafy greens. What you should feed most is what you cannot buy.

Common UK edible weeds

Why dandelion is not top of the list

Almost every other site treats dandelion as the staple weed. Our records place it at moderation, one band below plantain and sow thistle, for two reasons: it acts as a diuretic, and it carries oxalates that bind calcium.

None of that makes it a bad plant. It is genuinely valuable and worth picking. It simply should not be the only weed your tortoise ever sees, which is what happens when it is the only one an owner can identify. More on dandelions.

Weeds with a specific caution

• Clover and vetch are legumes and comparatively protein-rich. Clover stays in rotation; vetch is occasional, and the seeds and pods should be avoided entirely.
• Chickweed contains saponins, so it is a rotation plant rather than a base.
• Sow thistle should not be picked from heavily fertilised ground because of nitrate accumulation.
• Nettle is fine when correctly identified, but it is the one on this list where misidentification has consequences.
• Bramble and grape vine give you young leaves and flowers. The fruit is a different matter and only suits fruit-eating species.

How to identify safely

The rule that matters: if you cannot name it with confidence, do not feed it.

• Learn a small number of plants properly rather than a long list vaguely. Six confidently identified weeds beat twenty guesses.
• Use botanical names when cross-checking. Common names overlap badly, and plantain the weed has nothing to do with plantain the fruit.
• Beware the dandelion lookalikes. Hawkbit, cat’s ear, nipplewort and sow thistle are all yellow composites and all edible, which makes this a forgiving family. That is luck, not a rule.
• Cross-reference with The Tortoise Table’s plant database when you meet something new.
• Do not rely on the tortoise to self-select. The claim that they instinctively avoid harmful plants does not hold up, particularly in a small enclosure where the choice is limited.

One published case makes the point. A nine-year-old spur-thighed tortoise developed chronic gastrointestinal disease after eating wild lettuce, Lactuca virosa, and took 158 days of treatment to recover. Wild lettuce appears on nobody’s danger list.

Where not to forage

Avoid completely:

• Roadside verges. Vehicle pollutants and routine council spraying.
• Anywhere treated with weed killer, lawn feed or slug pellets. This includes your own lawn if you have used weed and feed.
• Field margins and farmland edges. Pesticide drift and fertiliser runoff.
• Popular dog-walking routes. Contamination risk.
• Heavily fertilised ground. Nitrate accumulation in leaves, which is why our sow thistle record flags it specifically.

Garden centre and florist plants deserve their own warning. They arrive treated with pesticides as a matter of course. Grow them on for several weeks and harvest the new growth rather than feeding them the day you get home.

Washing and preparation

• Rinse everything thoroughly, even from your own garden.
• Do not chop finely. Fibre length matters. Tortoises swallow leaves whole, and only the cut ends are exposed to gut bacteria. Chopping creates surface area and speeds fermentation, which pushes growth in the wrong direction. The reasoning is in Mediterranean tortoise diet.
• Feed young leaves for bramble, blackberry and grape vine.
• Mix several species in each feed rather than a bowl of one plant.
• Pick fresh. Weeds wilt fast and lose appeal.

Seasonal availability

Winter is the reason to plan ahead. A planted pen or a few pots sown in spring will carry you a good deal further into the year than foraging alone. See grow your own tortoise food.

Growing your own

Growing beats foraging on three counts: you know what has been sprayed, you know what the plant is, and it is there when you need it.

• Easiest to establish: plantain, dandelion, clover, chickweed, mallow
• Best value for a planted pen: a wildflower and weed seed mix sown across the enclosure, allowed to flush in spring and coarsen through summer
• Container option: even a few deep pots of plantain and mallow on a patio will supplement the diet
• What the Tortoise Trust does: plants the pen and provides no supplemental food at all in the growing season, which keeps tortoises at a healthy weight without the overfeeding that a daily bowl encourages

To check any plant not covered here, the tortoise food checker holds 105 records with verdicts by species group. Flowers are covered in safe flowers for tortoises, and the complete banded list is in the tortoise food chart.

Ratings follow our own food records, built from the Tortoise Trust, the British Chelonia Group, The Tortoise Table and published veterinary sources, and checked as set out in our sources and review policy. This is husbandry information rather than clinical advice. See our veterinary disclaimer.

Last reviewed: September 2026.