Answer
Yes, it is recommended to fertilize your lawn every year to keep it healthy and vigorous.
Explanation
Like any plant, grass needs nutrients that it draws from the soil and through fertilizers applied as part of a maintenance program. A lawn that isn't fertilized becomes more vulnerable to insects, diseases, and weeds. By applying fertilizers in small doses throughout the season, you provide your lawn with the necessary nutrients at the right time, without harming the environment.