88 Days to maturity. Citrullus lanatus. Peacock Improved Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, picnic watermelon. Suitable for growing in garden plots. AKA: Peacock Improved Shipper. A popular heirloom watermelon in the southwestern region of the USA. It produces hardy fruits that are particularly well suited to being shipped. About 585 seeds per ounce.