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These are both for teaching Herbology and growing enough rare and exotic plants to keep all three schools well stocked. There are more greenhouses than before, and those seeking mastery in Potions or Herbology can often be found helping out in the maintenance of the elaborate gardens. They are numbered according to danger level, and the younger students only ever enter the first three greenhouses. LIFE students and professors use any additional greenhouses for more treacherous studies that wouldn't be part of general education.