The answer to 'frequency of lawn fertilization' is that most lawns should be fertilized 2-4 times per year, depending on the type of grass and climate. Proper fertilization helps maintain a healthy, lush lawn by providing the necessary nutrients for growth and recovery.
Cool-season grasses like fescue and bluegrass typically need fertilizing in the fall, while warm-season grasses like bermuda and zoysia should be fertilized in late spring or early summer. The exact timing and frequency may vary based on your local climate and lawn conditions. It's best to follow the recommendations from your local cooperative extension or a professional lawn care service.