The answer to 'hardscaping turning brown' is that there are several common causes, including overexposure to sunlight, improper drainage, and chemical damage. Symptoms may include fading, discoloration, or crumbling of the hardscaping material. Solutions can vary depending on the cause, but may involve adjusting the landscape, resealing or repairing the hardscaping, or replacing damaged areas.
For minor issues, homeowners may be able to address the problem themselves through simple maintenance and repairs. However, for more significant or complex problems, it's best to consult with a professional landscaping technician who can assess the situation and provide the appropriate solution.