Nettle and comfrey liquid manures: two extremely important plant tonics and preventives for the garden, orchard, vineyard, market garden and farm. Their potency is bolstered by addition of the biodynamic compost preparations 502-507 and the use of “structured water”. These products come in two sizes for small gardens and modest horticulture settings only. For larger situations it is best to make your own – refer to our Biodynamic Handbook for directions.