St. John's Wort is a beautiful shrub to have in a medicinal garden. It is one of the showiest flowering herbs. My St. John's Wort shrubs are landscape varieties rather than the true medicinal herb. They are about three feet tall. They have a heavy spring flush of blooms and then bloom sporadically after that. They are evergreen. Medicinally, the flowers can be harvested and stored in oil for up to two weeks. The oil is used as an antiviral, an astringent, and a sedative. It has become a popular substitute for Prozac. Additionally, yellow dye can be made from the flowers.
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