Old crochety multi-stemmed shrubs are perhaps the most intimidating plant to prune. Here is a video where I go over the process. There are two basic steps:
- Cut out 25-30% of the oldest and largest stems at the base of the plant each year until they are replaced by new growth (a 2-3yr. process)
- Finish by lightly pruning unruly and out-of-shape branches into a vase-like form.
You will be surprised at how good it looks once you get some of that old growth out of there.