Herbology class is taught in the seven greenhouses located on the grounds by Professor Sprout who is quite likeable. The Herbology classes differ greatly for each year of Hogwarts students. By the time a student is in their seventh year, if they have decided to proceed with Herbology will have learned about most of the known plants and their uses in potions and healing. They also learn how to work with and care for some of the deadliest plants in the wizarding world such as belladonna and hellebore.