20+Black Diamond Watermelon Seeds(Citrullus lanatus)Average Fruit WT 30-50lbs USA An excellent late-season variety for home and market growers. The dark blue-green rind is tough and briuse resistant. Large leaves prevent sunburn on the melons. The flesh is bright red with great flavor, sweet and firm. They average 35 to 50 pounds, but can get up to 74 pounds. Ready in about 90 days. Sowing and planting: Gardeners in warm climates will be able to direct sow watermelon as soon as the soil temperature reahes at least 75 degrees F,planting six seeds per hill with 6-8in of space in all directions.Thin to the strongest two or three plants as soon as the seedlings appear. Watermelon seeds for sale shoud be planted in full sun and rich,loose soil.Young seedlings may benefit from black plactic to warm up the soil. As soon as the vines begin to develop, apply a thick layer of mulch to control weeds and protect the melons for soil contact.Keep the soil moist until the fruit begins to grow,then water only if the soil dries out completely. Watch out for insect pests, which can be a problem.