A pineapple is a fruit that can be found growing just west of Brimhaven or on a player grown Pineapple plant. Additionally, It can be purchased from charter crewmembers, Funch's Shop from Heckel Funch, or from Hudo Glenfad in the Grand Tree Groceries store.
Pineapples provide an easy way to make supercompost by putting it into a compost bin, as they are relatively cheap and easy to obtain. It can be sliced or diced with a knife. Slicing the pineapple will yield 4 pineapple rings, each healing 2 hitpoints. Dicing the pineapple yields one pineapple chunks, which also heals 2 hitpoints when consumed. When slicing the pineapple into pineapple rings if you don't have enough space in your inventory, the rings will drop to the ground instead.
Pineapples(10) are also used as a payment for Papaya Trees.