Prepare the planting site a few months before you plan to transplant your Concord grape vines. Since grape vines should be planted in the spring, begin to prepare the site during the fall prior to planting. Remove all weeds, grass and stones. Dig out the site at least 4 feet deep to allow for healthy root development. Reserve the removed soil in a wheelbarrow or bucket.
Begin to fill in the hole alternating between the original soil and rich, organic compost.
Transplant the grape vines early in the spring when the vine is dormant. Dig out approximately 2 to 3 feet of the soil from the planting site. Set the soil aside.
Carefully dig out the Concord grape vine you are transplanting. Try to avoid cutting or damaging any of the plant's root ball. Soak the root ball for approximately two hours in a large pail of clean water with ½ cup of bone meal added and dissolved.
Place the grape vine into the hole, spreading out the roots to prevent cramping. Fill in the hole, patting the soil down lightly. Water the planting site thoroughly.
Keep the soil wet but not saturated throughout the first summer after transplanting. Once the fall season arrives, only water lightly when the soil becomes dry and dusty.
Prune the vine before winter to remove all but a few of the strongest vines. Prune these vines back to leave two live buds.
Place a layer of mulch around the base of the plant to keep roots warm and hydrated during the winter months.