Fertilize the second season after transplanting. It is best to have them “deep root” fed by a professional. If you choose to do it yourself, a good general purpose fertilizer is 10-6-4. Sprinkle the fertilizer on the ground around the plant. Water it in slowly.
Keep turf grasses away from the rootball. A good way to do this is to keep the area around the tree mulched so no grass can grow. Turf grasses absorb a great deal of nutrients from the ground. These nutrients are extremely important for a newly planted tree to grow well. You will also avoid bark damage done by lawn mowers.
A tree that is properly cared for is a happy and healthy tree. Care for yours and enjoy it!