Watermelon seeds that are spit on the ground could potentially sprout if they become covered with soil and receive water. However, for best results watermelon seeds should be planted one inch deep in small hills, according to the University of Illinois Extension.
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Marie Notnats enjoys learning about new topics and teaching people new skills. She has been writing professionally since 2008. She is a professional horticulturist with a Bachelor of Science degree in horticulture from Brigham Young University. She writes for About.com, Examiner.com, eHow, and assorted gardening blogs.