Few plants capture the essence of early summer quite like elderflower. For a few short weeks each year, hedgerows across the UK become covered in clusters of delicate white flowers whose sweet, unmistakable fragrance has inspired herbalists, cooks, foragers and folklore enthusiasts for centuries. Most people know elderflower as a cordial or perhaps the flavouring in a summer cocktail. Others may be familiar with its traditional use during colds and flu. But the elder tree has