Herbology Greenhouses

• Type: Herbology Classrooms
• Location: On the grounds of Hogwarts School of Witchcraft and Wizardry, sloping down towards the Forbidden Forest.
• Owner/Residents: Hogwarts School of Witchcraft and Wizardry; primarily managed by the Herbology professor, Pomona Sprout.
• Key Features: A series of glass structures of varying numbers, each containing different magical and mundane flora. The internal environments are magically controlled to suit the needs of the plants within.

The Herbology Greenhouses are a collection of glasshouses located on the grounds of Hogwarts, situated behind the main castle. Students pass them on their way down to the school's vegetable patch. The air inside the greenhouses is typically warm, humid, and filled with the scent of damp earth and fertilizer, often mixed with the unique fragrances of the magical plants they contain. There are multiple greenhouses, numbered at least one through three, with higher-numbered greenhouses generally containing more interesting and dangerous plants reserved for older students. A window pane in one of the greenhouses was known to be broken and stuffed with a moldy old cauldron. Students from all years attend Herbology classes in the greenhouses, learning to care for, harvest, and utilize a wide variety of magical plants. These lessons range from handling basic magical flora in first year to repotting noisy and dangerous Mandrakes in second year, and studying aggressive plants like Snargaluff pods in fifth year. The greenhouses are also a source of potion ingredients and defensive plants, with Professor Horace Slughorn known to have acquired Venomous Tentacula leaves from them.

The greenhouses serve as a key educational setting and a backdrop for several important plot developments throughout the series. In Harry Potter and the Chamber of Secrets, the greenhouses are central to the story's resolution. Harry Potter, Ron Weasley, and Hermione Granger learn to repot Mandrakes in Greenhouse Three. The mature Mandrakes are later used to create the Mandrake Restorative Draught, which cures the victims petrified by the Basilisk. The location also functions as a place for private conversations. In Harry Potter and the Goblet of Fire, Cedric Diggory gives Harry a clue about the second task of the Triwizard Tournament near the greenhouses. Later, Harry, Ron, and Hermione use the greenhouses as a place to discuss the tournament away from prying ears. During the Battle of Hogwarts in Harry Potter and the Deathly Hallows, the greenhouses become a vital strategic asset. Under the direction of Professor Pomona Sprout and Neville Longbottom, students launch a variety of dangerous magical plants, including Mandrakes and Devil's Snare, from the castle battlements to attack the invading army of Death Eaters. This highlights the practical and combative applications of Herbology.

• Greenhouse One: Used for first-year Herbology classes. The plants housed here are generally less dangerous than those in other greenhouses.
• Greenhouse Three: Used for second-year students and above. It houses more advanced and perilous plants, including Mandrakes, Puffapods, and was the site of a lesson on the Whomping Willow via a demonstration with a bandaged branch. Neville Longbottom's Mimbulus mimbletonia also sprayed Stinksap over several students near this greenhouse.

• In the film adaptations of the *Harry Potter* series, the greenhouses are depicted as a much larger and more elaborate complex of ornate, Victorian-style glass and iron structures, situated on a terraced, rocky part of the castle grounds rather than sloping down towards the forest. (film)
• The video game *Hogwarts Legacy* features an expansive and detailed greenhouse complex with multiple wings, including a dedicated wing for the Head of the Herbology Department, reflecting the design aesthetic established in the films. (video game)