Answer: Rosemary tends to become woody, almost like a shrub, with age. Usually it is better to pinch out the tips or shear it while it is growing rather than to cut it back hard into old wood. Regular frequent trimming w will result in a denser, bushier plant. (Each spot where you trim should develop additional branching.) Some varieties of rosemary are naturally taller and more upright than others, so to some extent your results will depend on that as well as your pruning technique. Newer growth can be trimmed back fairly hard, but I would be very cautious about cutting into hard wood. You might consider reducing or eliminating the fertilizing during the winter when the plant is indoors and growing in reduced light compared to summer. This should cut down on that oversucculent fairly weak winter top growth. I would remove most of that in spring so it can be replaced by the sturdier summer growth.
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