I would have to find a book or online source to explain in detail, but basically biodynamic planting uses a schedule based of celestial bodies' influence on Earth and it's plants, animals, and subtle energy. For example, the moon and each planet embody different energies, much like astrology does. Certain planets embody different energy which effects plants differently based off which part of the plant is desired to be worked with. Biodynamic agriculture relies heavily on intent to work properly, as do most things in this existence/reality/dimension/planet. Maria Thun did extensive work on a planting calendar and the effects for decades in Europe. If you want to plant broccoli for example the florets are consumed typically, being the flower part of the plant, days under the influence of energy benefiting flower crops, fire I believe. Carrots, onions, and potatoes would be examples of root crops, earth energy, and are typically harvested in the afternoon or evening when energy is flowing downward. Conversely, leaf crops such as lettuce, greens, cauliflower (as this thread mentioned), are worked with on leaf days, water energy (planets/influences). However, leaf crops should be harvested on root or fruit days due to the watery, wet influences of leaf days causing molds, etc (cabbages harvest on flower days). Stella Natura is a company that produces annual calendars for biodynamic farmers, their website has much more in depth information on these concepts. I have just a few notes I jotted down from Secrets of the Soil pertaining to such celestial guidance in stewardship.. full moons enhance germination, optimally right before the full moon. Abosrption and metabolism are at peak during full moon, so harvesting crops around this time is bad if they are meant for long storage. Crops meant to be above ground, ie any but root, it is best to sow on a waxing moon. Root crops are sown as the moon wanes. A descending or running high to low moon is best for downward growth such as transplant, pruning plants, or taking cuttings. Conversely ascending moons are good for germination as the energy and growth is flowing upwards. All these are recommendations and by no means a law or rule, more so suggestions made by Steiner and observed through trial and error by Maria Thun to harmonious with larger than typical humans think, celestial, and cosmic forces or energies. Hope this helped!