Maria Thun (1922-2012) gardened all of her working life and was an authority on biodynamics, an approach to agriculture and horticulture, developed by Rudolf Steiner, which uses the waxing and waning of the moon as well as the position of the planets to determine when different types of crops are best sown and harvested. She dedicated her life to researching what worked and why, discovering, for example, that onions harvested on root days stay firm when stored. Her annual Biodynamic Sowing and Planting calendar is published in 18 languages.
Maria Thun wrote Gardening for Life – The Biodynamic Way, a collection of her tried and tested methods of gardening with the moon.