You haven't said how large your tree is, so it is difficult to say how big the root-ball needs to be. A few guidelines: If your tree's trunk near the ground is 1 inch in diameter, dig a root-ball ...

If your tree was young and not bearing fruit yet, it should produce 12 to 18 inches of new growth on branches each year. An established, productive tree like yours should produce about 8 to 12 ...