Biodynamic preparations at Ambootia Tea Estate. Ambootia uses Bio-Dynamic organic principles to make the best compost possible. Revitalizing preparations made from Yarrow, Walerian, Chamomile, Nettle, Oak bark and Dandelion are used in small homeopathic doses. These concentrated preparations are injected into compost heaps for their positive effects No artificial fertilizers are ever used at Ambootia.