Dig the planting hole twice as wide and to the same depth as the root-ball. Remove the tree from the container, gently tease the roots and cut away any circled or tangled roots.
Position in hole and backfill with soil, gently firming down. Form a raised or doughnut shaped ring of soil around the outer edge of the plant's root zone. This helps keep water where it's needed. Always water in well after planting to settle the soil around the roots and keep the soil moist for several weeks while the new plant establishes.
Mulch around the base with organic mulch like bark chips, sugarcane or pea straw, keeping it away from the trunk.
Water deeply, once or twice a week, depending on weather conditions.