Prepare the new site by digging a hole about 18 inches wide and 12 inches deep. Store a few gallons of excavated soil in a bucket to fill the hole at the bush's old location.
Incorporate peat moss into the excavated soil in the bottom of the hole. Peat moss provides the balance of moisture retention and drainage that blueberries prefer.
Trim the blueberry bush to about 18 inches tall. Remove all dead, diseased and crowded branches. Reducing the size of the bush compensates for cutting back its roots.
Dig up the blueberry bush by digging a circle about 12 to 15 inches in diameter and 9 to 12 inches deep around the bush. If needed, cut through stubborn roots with pruners.
Place the bush in the new hole so that the soil level of the new site matches the soil level of the root ball.
Fill around the root ball with the peat moss/soil mixture. Settle the plant in the soil by watering thoroughly. Add a vitamin-rich plant starter at this time to facilitate faster rooting.
Cover the planting area with 2 inches of mulch. Keep the mulch 2 inches away from the trunk to make sure that the trunk stays dry and disease-free.
Dispose of excess soil from the new site by dumping it in the old hole and gently tamping it down with your shoe.