The answer to 'why is my hedge overgrown' is that hedges often become overgrown due to lack of regular trimming and maintenance. Over time, the branches and foliage can become dense and unruly, causing the hedge to lose its neat, manicured appearance. This can happen for a variety of reasons, such as not trimming the hedge often enough, using the wrong trimming techniques, or allowing the hedge to grow unchecked.
Overgrown hedges can be unsightly and may even encroach on walkways or other areas. Regular trimming is essential to keep a hedge looking its best and maintain its shape and size. Depending on the type of hedge and your local climate, most experts recommend trimming 2-4 times per year to keep it in check.