Determine where you want your berry hedgerow and what shape you want it to be. The best direction for a berry hedgerow is running east and west with a sunny southern exposure, although berries can handle some shade.
Dig a two-foot hole every eight feet where you want to build your berry support fence. Some taller berries that can serve as a hedgerow are natural leaners and perform best if they have a fence. Mulberries do not require a fence and you will plant them behind your raspberries, grapes or blackberries, if desired.
Set the posts in the holes. Mix the concrete with water in a wheelbarrow, turning it over with a shovel. If it's too dry, add small amounts of water, mixing thoroughly and checking to see if the concrete is wet enough before adding more. When the concrete is mixed, fill the hole with concrete all around the upright post. Allow the concrete to dry overnight.
Nail a horizontal 1-by-4-inch board to the posts every 18 inches.
Dig a hole twice as wide as your berry plants and slightly deeper than the container they came in. Remove the berry plant from the pot and put it into the hole so that the crown is at the same level in the hole as it was in the pot. Add slow release fertilizer according to manufacturer's instructions and fill the hole back in with loose soil. Press down around the plant to press air pockets out of the soil and water liberally.
Plant mulberry plants, using the same method, 6 to 8 feet north or west of the raspberries.