Plant-based sprays are increasingly popular tools used in organics and Biodynamics, the idea being the best way of curing a cultivated plant like a vine is to use another plant with medicinal, palliative or curative properties. Such sprays come in various forms: decoctions, essential oils, liquid fertilizers, teas.

Examples: Alex Podolinsky’s Prepared Horn Manure 500 + 502-507 Spray. | Chamomile tea. | Comfrey liquid manure. | Dandelion tea. | Essential oils. | Fern Liquid Manure. | François Bouchet’s Urticae 500 Spray. | Horn manure 500. | Liquid manures. |  Maria Thun’s Barrel Compost Spray 502-507. | Oak bark decoction. | Peter Proctor’s Cow Pat Pit 502-507. | Pfeiffer Field Spray Concentrate. | Pfeiffer Compost Starter. | Pfeiffer Field Spray Concentrate. | Prepared horn manure 500, 502-507. | Pruning wash. | Seaweed & Kelp Liquid Manures. | Stinging Nettle Liquid Manure. | Stinging nettle tea. | Valerian tea. | Weed Ashing. | Weed manures. | Willow decotion. | Winter Tree Paste. 

Bibliography 

François Bouchet., L’Agriculture Bio-Dynamique (Deux Versants, Paris, 2003), p.156.

Monty Waldin., Biodynamic Gardening (Dorling Kindersley, 2015).

Monty Waldin., Biodynamic Wine (Infinite Ideas, 2016).