For raspberries, five feet between rows should be plenty. Blackberry rows should be spaced about 7 feet apart. Within the row, red and yellow raspberry plants should be spaced 1-2 feet apart. They will grow together to form a solid hedgerow. Blacks and purples a should be spaced 2 - 3 feet apart.
Blackberries spread vigorously.
Allow 5-6 feet between plants. Trellising All brambles do best if they are grown on trellises. Basic Trellis Set 7-foot poles 2 feet into the ground. Space the poles 20-30 feet apart. Use three strands of nine-gauge wire for the trellis.