The pantry is a room to store all of your freshly grown fruit and vegetables. The room is chilled to keep prison grown-ingredients preserved. Grown ingredients left outside a pantry or Fridge/Tall Fridge for more than 3 days will be spoiled. As such, the pantry is preferred over storage room.
While Tall fridge only takes up 1 square of space, it can hold contents of two boxes. You can also use the Storage Shelf, but it does not save on space.