The Black Satin blackberry is a highly productive, thornless, semi-erect cultivar (Rubus fruticosus 'Black Satin') known for its vigorous growth, reaching 5-8' in height and 4-5' wide. It produces large, sweet, navy-blue to black berries, with harvests peaking in mid-to-late summer. Ideal for home gardens, this cold-hardy, self-pollinating plant thrives in full sun.