Lemon balm is a member of the mint family, and like all the mints, it tends to ramble. It produces long stems that start out tidy but eventually begin to lean every which way like a head of unruly hair. Wandering by a patch in spring you'll see light green, toothed leaves in a dome shaped mound. The plant can grow to almost five feet in some cases, but tends to be somewhat smaller -- and certainly looks best if cut back regularly to maintain a cohesive shape.
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