Chamomile tea is a plant-based spray used to promote vine balance and alleviate heat stress. Chamomile tea is popular amongst biodynamic wine-growers. It is made from flowers picked in the same way and from  the same strain of chamomile used in the biodynamic compost preparation 503. Chamomile is rich in sulfur, so blending its tea with the sulfur sprays used against oidium is said to make them more effective. Chamomile’s calcium and potash content also helps stimulate healing processes in vine shoots and leaves damaged by hail, or pruning. Chamomile helps clear blockages as its ‘fine roots break up compacted soil, giving structure to the topsoil,’ say von Wistinghausen et al, adding that in humans chamomile relieves blocked digestion by bringing a ‘dissolving and healing process to the mucous membranes in particular. It can have demulcent and healing properties where inflammatory changes or hardening occur in the gastrointestinal tract,'(von Wistinghausen et al., 2000, p.38). Similarly on vines, chamomile stimulates sap movement during potentially stressful weather extremes of heat, cold, rain or drought, especially if sprayed during the descending moon. Maria Thun (2003, p.175) says chamomile tea is best sprayed on vines at sunrise. See also chamomile cold extract. 

Bibliography

Maria Thun., Results from the Sowing and Planting Calendar (Floris, 2003) trans. by G. Staudenmaier, p.175.

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

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

von Wistinghausen, Christian., Scheibe, Wolfgang., von Wistinghausen, Eckard., and König, Uli., The biodynamic spray and compost preparations production methods Booklet 1 (Biodynamic Agricultural Association UK, 2000), p.38.