The answer to 'why is my garden mud' is that your garden is likely experiencing poor drainage, excessive moisture, or soil compaction. These common issues can lead to a muddy, waterlogged garden that is difficult to work with and maintain.
Some common causes of a muddy garden include heavy rainfall, overwatering, poor soil composition, and heavy foot traffic. Symptoms may include standing water, squishy soil, and difficulty walking or working in the garden. To address this, you'll need to improve drainage, aerate the soil, and potentially amend the soil composition.