For the most part, you can prep fruit skewers up to 12 hours ahead of time. However, this depends on what types of fruit you are adding to your kabobs. Certain fruits such as apples and bananas will brown quickly, so you wouldn’t want to make any Fruit Kabobs ahead of time with these types of fruits on them. If you do plan to put fruit on skewers ahead of time, lay them on a tray and cover with plastic wrap so that most surfaces are touching the plastic. Store in the fridge overnight.