It’s elderflower season! Now is the time to harvest flower heads to make delicious elderflower cordial. I did exactly that last weekend when I discovered a tree laden with blossom at a friend’s small holding in Greytown. Elder is such an amazingly useful tree, providing fruit and flowers that have medicinal benefits as well being a tasty ingredient in cordial, syrup and even champagne. I’ve harvested the berries in autumn to make a delicious and nutritious cough and chest tonic.…