Plants used for hormone imbalances For hormone imbalances a tea was made with one of the herbs given below or 1 tsp of the ground herb was put directly on the food. Leaves of strawberry (Fragaria virginiana), flowers of linden (Tilia europea) (safe for pregnant animals), flowers of evening primrose (Oenothera biennis) or flowers of chamomile (Matricaria recutita syn. Matricaria chamomilla) were used. Berries of agnus castus or chaste tree (Vitex agnus-castus) were utilised for severe cases. Chaste tree was said to stop production of testosterone (used as an herbal gelding). Leaves of lady's mantle (Alchemilla vulgaris) and aerial parts of passion flower (Passiflora incarnata) were also used. A tea of crampbark (Viburnum opulus) was given if the animal had cramps (cramps that the respondent thought were hormonally-linked).