Rosemary (Salvia rosmarinus) is a woody, evergreen herb native to the Mediterranean region. It is a popular culinary herb, used to flavor a variety of dishes, and is also used in traditional medicine. Rosemary plants can grow quite large, so it is important to cut them back regularly to keep them in shape and encourage new growth.
The best time to cut back rosemary is in the spring or fall. Avoid cutting it back in the summer, as this can stress the plant. When cutting back rosemary, use sharp shears or pruning scissors to make clean cuts. Cut back the stems by about one-third to one-half their length. You can also remove any dead or diseased branches.