Thornless blackberry 39black satin39 is a self45fertile variety with a vigorous growth habit producing very high yields of juicy berries at the end of the summer easy45to45grow and requiring very little maintenance all 39black satin39 needs is an annual prune to promote new growth for next year39s crop beyond that you can simply plant it and enjoy the delicious fruits in due course33 height 300cm 401183441 spread 300cm 401183441