Nettles

The sting disappears

The stinging nettle’s formidable defence — hollow hypodermic trichomes that inject a mixture of histamine, formic acid, and serotonin into skin — disappears completely when the plant is heated or dried. Plunging nettles into boiling water for one minute destroys the stinging mechanism entirely. The resulting wilted leaf tastes somewhat like a strong spinach, with an earthy, slightly mineral flavour and a deep, vivid green colour.

Young shoots only

Only the young growing tips of nettles are suitable for eating — the top 4–6 cm of new growth in spring, before the plant begins to flower. Older leaves become tough, less flavourful, and develop cystoliths (calcium carbonate crystals) that can irritate the kidneys if eaten in large quantities. In spring, when nettles are at their youngest and most tender, they are at their nutritional peak.

Nutritional value

Young nettles are remarkably nutritious — among the most nutrient-dense wild plants available in Britain. They are rich in iron (more than spinach per 100 g), vitamin C, calcium, magnesium, and protein. They were historically important as a spring vegetable in times when preserved winter food supplies were exhausted and fresh vegetables were scarce.

Nettle soup

The classic British and Irish nettle soup is one of the simplest spring recipes: onion and potato softened in butter, fresh nettles added and wilted, stock added and simmered, then blended until smooth. A swirl of cream, a sprinkle of nutmeg, and the soup is done. The result is a bright green, deeply flavoured, silky soup that tastes unmistakably of spring.