The answer to 'stone walkway thin grass' is that it is a common problem caused by a lack of soil, sunlight, or proper maintenance. Thin grass around stone walkways is often due to the compacted soil, limited space for grass to grow, and lack of sunlight reaching the ground. This can lead to patchy, sparse grass that looks unsightly.
To fix this issue, you can try aerating the soil, adding topsoil and compost, and planting a more shade-tolerant grass variety. However, if the problem persists or the walkway is in poor condition, it's best to consult a professional landscaper who can assess the situation and provide the best long-term solution.