The answer to 'why is my grass erosion' is that grass erosion is typically caused by water runoff, poor soil quality, or improper lawn care. Symptoms include bare patches, gullies, or a sloping appearance to the lawn. Solutions may include improving drainage, adding topsoil and overseeding, or adjusting your mowing and watering habits.
Grass erosion is a common issue for many homeowners, but the causes and solutions can vary depending on the specific conditions of your lawn. It's important to diagnose the root cause in order to effectively address the problem.