For over forty years, Maria Thun has been researching optimum days for sowing, pruning, and harvesting various plant crops. Collected here for the first time are results from this work, showing the influence of the rhythms of sun, moon, and planets on plant growth. This book shows that if farmers and gardeners link their work into these cosmic rhythms, the quality of their produce is markedly increased. Avoiding unsuitable days is shown to help prevent crop damage through disease and pests. Methods of fertilizing and spraying have been developed which further enhance produce, allowing a sustainable and ecologically balanced agriculture. Includes sections on the stars, the soil, composting and manuring, weeds, and pests, as well as growing cereals, vegetables, herbs, fruit and vineyards.