Watermelon Charleston Gray 133 – (OP) 85 days. Long, uniform melons with a hard, thin, light green rind and fine red flesh with firm texture, sweet flavor and large brownish-black seeds. Long bearing vigorous vines. Should you want smaller melons, drill rows closer together, little pruning. Excellent shipper. A factor of importance is that the degree of wilt tolerance is greater in this melon than in the original Charleston Gray. Tolerant to Wilt, Anthracnose, Sunburn.