Cut or clip away the underlying growth attached to the base of the tree, called suckers, and break away any weak branches with pruning shears or a saw. You may need to set up a ladder to reach the uppermost part of the tree.
Prune the blooming areas of the tree in the springtime. By clipping these areas of new growth, you encourage more flowering in the summertime and will have a multiplying effect on the number of flower buds.
Remove the oldest or tallest branches of the tree if growth has slowed. Continue down from that point until approximately one-third of the branches are gone.
Cut away any additional branches to restore a symmetrical appearance to the tree. Shorten any others that are much taller than the others so that all have an equivalent height.