A cautious guide to foraging wild herbs in Britain: positive identification, deadly lookalikes such as hemlock and lords-and-ladies, the law, and which herbs are good to start with.
The short answer¶
Foraging for wild herbs is enjoyable and can be perfectly safe — but only if you follow one rule without exception: never eat a plant unless you have positively identified it, using several features, and are 100 per cent certain. "It looks like" and "it smells a bit like" are not identification. Several deadly British plants resemble common edible herbs, and some of them grow in the same places at the same time. Start with a handful of distinctive plants, learn their poisonous lookalikes as carefully as the herbs themselves, and read our page on poisonous lookalikes before you go.
⚠️ If in doubt, leave it out
Poisonings from foraged plants in Britain are rare but real, and the plants involved include some of the most toxic in Europe. If you are unsure, do not taste it — even a nibble of some species is dangerous. If someone becomes ill after eating a wild plant, seek medical help immediately (in the UK, call NHS 111, or 999 in an emergency) and keep a sample of the plant.
How to identify a plant properly¶
- Use more than one source. A good regional field guide with keys and botanical descriptions, not just photographs. Apps can suggest a name but are not reliable enough to eat on.
- Check every feature. Leaves (shape, arrangement, hairiness, smell), stem (round, square, hollow, ridged, spotted), flowers, seeds, root, and habitat. Plants look very different through the seasons.
- Know the lookalikes. For every herb you forage, learn the plants it can be confused with and how to tell them apart.
- Pick one plant at a time. Leaves of different species easily get mixed in a bag, which is how many wild garlic poisonings happen.
- Learn from an expert. A guided foraging walk with an experienced local forager or botanist is the best introduction.
The dangerous lookalikes¶
| Edible herb | Deadly or harmful lookalike | How to tell them apart |
|---|---|---|
| wild garlic (Allium ursinum) | Lords-and-ladies (Arum maculatum); lily of the valley (Convallaria majalis); autumn crocus (Colchicum autumnale) | Wild garlic leaves smell strongly of garlic when crushed — but the smell lingers on your hands, so check each leaf. Lords-and-ladies has arrow-shaped leaves with branching net veins; wild garlic veins run parallel. Lily of the valley leaves come in pairs from a sheath and have no garlic smell. |
| Wild fennel, wild chervil (cow parsley), sweet cicely | Hemlock (Conium maculatum); hemlock water-dropwort (Oenanthe crocata); fool's parsley (Aethusa cynapium) | Hemlock has smooth stems blotched with purple and an unpleasant mousy smell. Hemlock water-dropwort grows by water and has swollen, pale roots. These are among the most poisonous plants in Britain. |
| Wild mints | Few truly dangerous lookalikes, but check for the mint smell and square stems | Mints have square stems, opposite leaves and a distinct minty scent |
| Watercress | Fool's watercress (Apium nodiflorum), which often grows alongside the far more dangerous hemlock water-dropwort | Best bought cultivated; wild watercress carries a risk of liver fluke and should be cooked, not eaten raw |
⚠️ Beginners: avoid the carrot family
The carrot or parsley family (Apiaceae, formerly Umbelliferae) — plants with umbrella-shaped heads of small white flowers and finely divided leaves — contains excellent herbs such as wild fennel and sweet cicely, and also hemlock and hemlock water-dropwort, which can be fatal in small amounts. Many experienced foragers advise beginners not to eat any wild member of this family at all until they have years of experience. Some members, such as giant hogweed and wild parsnip, also cause severe skin burns in sunlight.
Good herbs to start with¶
| Herb | Season | Where | Notes |
|---|---|---|---|
| wild garlic (ramsons) | February–May (leaves); April–June (flowers) | Damp, shady woodland, often in carpets | Distinctive garlic smell; see lookalikes above. Flowers and green seed pods are edible too |
| Water mint (Mentha aquatica) | Late spring–autumn | Wet ground, riverbanks, ditches | Strong, slightly peppery mint scent; pick from clean water only |
| Wild marjoram (Origanum vulgare) | Summer | Chalk and limestone grassland | The same species as garden oregano, usually milder in Britain |
| Wild thyme (Thymus drucei/T. polytrichus and relatives) | Summer | Short grassland, heaths, dunes | Small, creeping; pick sparingly |
| Garlic mustard (Alliaria petiolata) | Spring | Hedgerows, woodland edges | Mild garlic-and-mustard flavour; heart-shaped leaves |
| Alexanders (Smyrnium olusatrum) | Late winter–spring | Coasts, especially in the south | A carrot-family plant: yellow-green flowers help identify it, but see the warning above |
| Wild fennel | Summer–autumn | Coasts and waste ground | As alexanders — confident identification essential |
| Elderflower (Sambucus nigra) | May–June | Hedgerows | Flowers only; raw leaves, stems and unripe berries are harmful |
Picking responsibly and legally¶
The law differs across the UK and changes over time, so check current guidance. In broad terms, in England and Wales:
- Under the Theft Act 1968, picking the flowers, fruit, foliage or fungi of plants growing wild is not theft if it is for personal use and not for sale.
- Under the Wildlife and Countryside Act 1981, it is an offence to uproot any wild plant without the landowner's permission, and some rare species are protected entirely.
- Nature reserves, Sites of Special Scientific Interest and some public land have byelaws that ban or limit picking.
- Scotland has its own rules under the Scottish Outdoor Access Code.
Good practice: take only from abundant populations, a small proportion from each plant or patch, leave flowers for pollinators, never uproot, avoid roadsides, field edges that may have been sprayed, and areas used by dogs, and ask the landowner where you can.
In the kitchen¶
Wash foraged herbs well. wild garlic makes an excellent pesto and is superb in butter, soups and risottos; wild marjoram and thyme dry well (see drying herbs); water mint makes a bracing tea and can replace mint in a mint sauce. Freeze surpluses as herb butter or in oil (see freezing herbs).