This week James turns his attention to roots. He shows how marshmallow and liquorice roots can be easily grown in the garden and how they can be combined to make a soothing syrup to relieve the discomfort of a cough. Valerian is used to create a delicious hot chocolate, which could help to relieve stress. A homemade tincture is made from echinacea, which is used to make spicy ice-lollies that could help fight a cold. And ginger is made into some tasty treats, which could help people with travel sickness.