小麦 is a form of crop which can be grown from 小麦の種 in the garden below the 作業場 known as the kitchen garden. Alternatively it can be purchased from the Miller. 小麦 is not an improvable crop, meaning it does not have a variety of quality levels and cannot be improved with fertilizer. It can only be made to grow faster using boost fertilizers. See the page on 農業 for more information on how crops are grown and improved.