Answer: Since the plant will be unsightly if you do nothing, you might try cutting it back to the ground or at least by half and see what happens. (You would cut it back hard for harvest, so a healthy plant should be able to regenerate.) If the plant is truly woody it may not recover from this treatment, but since it is a tough plant odds are good that it will come back better than ever. As a safeguard you might try rooting some of the tips you trim off in case you lose the original plant.
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