You must avoid long internodes. Prune your azaleas and remove all blossoms. Azaleas set next year s buds in the summer. You must develop the skill of fine wiring. Once mastered you will find that fine wiring is relaxing.
Summer is a wonderful time for fine wiring.
Wiring can be done at any time on all conifers. If some branches are unusually heavy you might find it helpful to force the limbs downward by use of guy wires that are attached to the container or a lower part of the trunk. Or you can place the container on a piece of plywood and attach the guy wires to the plywood by use of screw eyes. The guy wires can then be gradually tightened until you have achieved the desired limb placement. If you have a safe storage area you can store spray bottles with various insecticides and fungicides.