You can leave it to grow as a multistemmed shrub. One way to encourage this is to tip prune long shoots to where a side shoot attaches to direct growth outward. Don't prune it excessively. That plant really needs very little pruning. Don't fertilize it a lot as it doesn't need it. Good light is important in creating good color. Excessive fertilizing does encourage long, lanky growth, especially if you also water a lot or if it rains a lot.
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