The answer to 'why is my stone walkway weeds' is that weeds can easily grow through the cracks and crevices in a stone walkway. This is a common problem caused by a lack of proper weed prevention and maintenance. Weeds thrive in the soil and moisture between the stones, and their roots can work their way into the walkway over time.
To solve this issue, you'll need to address the root cause by sealing the cracks, applying a weed-preventing product, and staying on top of regular weeding. This is a task that most homeowners can handle themselves, but if the problem is severe or the walkway is large, it may be best to call in a professional landscaper to ensure the job is done right.