Select a planting site for each plant. Shrub trees will have varying needs for sun and shade depending on the species. In general, tropical shrub trees, such as the common fig, do best when planted in full sun, while urban shrub trees, such as the forsythia, thrive in partial shade.
Excavate the soil at the chosen site with a sturdy garden spade. Dig a broad hole at the planting site that is no deeper than the tree's root ball, so the settling soil will not cause the plant to sink.
Space the planting sites at least 2 feet apart. Set the tree shrubs in a straight line to form a hedge or border. As the trees grow, the branches will mesh together to form a solid wall of vegetation. For a less formal arrangement, plant tree shrubs in groups of three. Leave 5 to 10 feet of space between each plant to keep them from growing into each other. Consider the height of the tree shrubs at maturity, placing smaller plants in front of taller ones to produce a layered look.
Set each shrub tree in the center of a hole. Refill the planting sites with the excavated soil. There is no need to amend the soil, as the additional organic matieral discourges root growth beyond the planting area.
Pour 1 to 2 gallons of water around the base of each shrub tree. Inspect the plants daily adding just enough water to keep the soil at the planting site moist. When the shrub trees display obvious signs of growth, reduce the schedule, watering twice a week for 20 minutes.
Prune any broken or wayward branches at planting time. Use a pair of sharp pruning shears to snip off any damaged foliage, leaving the remainder of the tree shrub intact. Do not remove branches to compensate for roots lost during transplantation.