The answer to 'why is my grass mud' is that there are several common causes for muddy grass, including poor drainage, soil compaction, and excessive moisture. Muddy grass is a sign that the soil is not able to properly absorb and drain water, leading to waterlogged conditions and a soft, muddy surface.
Some of the most common symptoms of muddy grass include standing water, squishy or spongy ground, and difficulty walking on the lawn without getting dirty. Solving the problem often requires addressing the underlying drainage or soil issues.