Peacock WR60 Watermelon Seeds. 85 Days. Annual. Heirloom, non-GMO, open pollinated seeds. Citrullus lanatus. AKA: Peacock. This heirloom watermelon prefers sandy soils and like all watermelons likes full sun and warm to hot growing conditions. The peacock WR-60 watermelon is on the higher end of the watermelon spectrum as far as water content. About 400 seeds / Oz.