It is possible to save and use watermelon seed next year. The link at the end explains the procedure. You won't get the same plant, however. Your watermelon is a hybrid, meaning it has 2 parent plants. Hybrid seeds are like children; you end up with a genetic mixture and offspring do not exactly match the parent. https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/storing-seeds.htm
Answered on December 10, 2018
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