The answer to 'why is my paver overgrown' is that your paver may be overgrown due to a lack of regular maintenance, such as weeding and edging. Over time, weeds, grass, and other vegetation can take root in the spaces between your pavers, causing them to become overgrown and unsightly.
Some common causes of paver overgrowth include poor drainage, lack of weed control, and not properly sealing the pavers after installation. To address this issue, you'll need to regularly maintain your pavers by pulling weeds, trimming grass, and applying a paver sealant to prevent future growth. If the overgrowth is severe, you may need to consider professional paver cleaning or even re-laying the pavers to fully address the problem.