The Black Satin Blackberry plant is a very productive plant, and is extremely vigorous, growing quickly and establishing itself. It produces a large crop of beautiful, large, sweet Black Satin thornless blackberries, which ripen around July. Black Satin Blackberry plants are not self supported vines. So plant them along a fence or run on a trellis to keep the heavy crops of berries off the ground. Choose Willis Orchards for quality blackberry bushes for sale!