The answer to 'my lawn fertilization looks bad' is that there are several common causes, including applying the wrong type or amount of fertilizer, improper timing, or environmental factors like drought or disease. Symptoms may include patchy growth, discoloration, or weed growth. The best solution depends on the specific issue, but may involve adjusting your fertilization schedule, aerating the soil, or treating for pests or disease.
If the problem persists or you're unsure of the cause, it's best to consult a professional lawn care service. They can diagnose the issue and recommend the appropriate treatment. DIY fertilization can be tricky to get right, so calling in an expert is often the best way to ensure a healthy, thriving lawn.