Handle the root ball carefully. Breaking it will injure the roots.
Dig the hole about 6 - 8" wider than the root ball.
If planting in sand, the depth should be the same level that it was grown in. When plating in clay, the root ball should be placed on a 4-6" bed of gravel to minimize drainage problems. Planting on a bed of gravel will give some excess water a place to settle. If you are planting in heavy clay, plant the ball about 2" above the surrounding soil while grading a slope to drain excess water away.
Cut all twine from around the trunk AFTER all handling and backfilling with good topsoil. (The wire basket and burlap should remain around the root ball) Stake to hold tree upright.
Backfilling with good topsoil.
In sand use the extra soil to make a dike out at the drip line to contain the water. Water about once a week, depending on rainfall and temperature. When planting in sandy soils some mulch will help retain soil moisture.
In clay, water at planting time to settle the soil. Use judgment as to the need for a dike to contain water. Depends on soil conditions. Check moisture in the ball weekly and water as necessary. DON'T OVERWATER
You may fertilize but be careful with soluble fertilizers. Use 12-12-12 at 4 oz. to a 6 foot tree and spread evenly around the drip line. Over fertilization can cause a toxic reaction. It is safer to use a slow release fertilizer.