90 Days to maturity. Citrullus lanatus. Carolina Cross Watermelon Seeds. Non-GMO, annual, open-pollinated, heirloom, heat tolerant, seeded, Giant watermelon. The Carolina Cross is one huge melon! Want to win the county fair? This huge elongated fruit can weigh 150-200 pounds! The rind color is light green with red flesh. The perfect variety to try with the kids. ~225 seeds/oz.