The answer to 'why is my sod overgrown' is that your sod is likely growing too quickly due to factors like excessive moisture, nutrient-rich soil, or warm temperatures. Overgrown sod can become matted, difficult to mow, and prone to disease or pest problems.
Some common causes of overgrown sod include overwatering, over-fertilizing, or planting the wrong type of grass for your climate. The best solution is to adjust your lawn care routine and maintenance schedule to keep the sod healthy and at the optimal growth rate.