Freezing grapefruit is an easy way to prolong shelf life and make them last longer. Here's how you can do it: Start by washing the grapefruit in cool water with a mild dish soap. This will help remove any dirt or debris from the skin of the fruit before freezing it. Next, use a sharp knife to cut off both ends of the grapefruit, then cut it into round or wedged slices so they're easier to freeze and store later on. You can also blend your slices into smaller pieces if that's what you prefer! Place your prepared slices onto a baking sheet lined with parchment paper or wax paper – this helps prevent sticking while freezing - then place in freezer until they're frozen solid (about two hours). Finally, when ready to store grapes permanently, transfer each slice into an airtight container or Ziploc baggie and return them back to the freezer until needed! This method should help preserve your frozen grapes for up to three months without losing flavor or texture quality!