There are a few things you need to start a watermelon farm in Minecraft. First, you’ll need some watermelons. Second, you’ll need some farmland to grow the watermelons on. Finally, you’ll need a tool to help you harvest the watermelons. To start, find a piece of farmland and place a watermelon on it. Once the watermelon is placed, right-click it and select “harvest.” This will cause the watermelon to grow and yield fruit. You can also harvest them by hand if you have an Agricultural Tool or an Axe.