Many tips to learn how to prepare your own garden potions: purines, whitewashes and treatments from plants and natural elements. Nettle, comfrey, horsetail, fern, garlic, but also clay, bicarbonate, beer, milk, algae or essential oils ... the organic gardener concerned with autonomy does not lack resources to care for, stimulate or fertilize his plants with homemade preparations thanks to the advice of a garden fairy.