Lily didn't always care for potions lessons, but had managed to convince herself to come to this one. So, sitting off to the side of the room, she quietly took notes. Notes about some sort of growth potion. After jotting down several possible items that could be ingredients in this potion, the third year thought of something. Putting her hand up, she voiced her idea. "Water.... possibly because it is used in many potions as the base ingredient." So if it was in other potions, it might as well be in this potion as well. The third year couldn't remember having a potion without it.