Sep 6, WHEN you think of the health benefits of watermelon, the seeds probably do not come to your mind. You probably think of the sweet, juicy pulp. Johnny's watermelon varieties are chosen for their early yield — even in cooler, less than optimal climates. We offer both diploid and triploid watermelons in a. Jul 29, Watermelons, as anyone who's ever eaten one has likely noticed, contain both small white seeds and larger black ones. Seeing as it's.