QuestionsHow to growLawnsFeedingAerate or feed first 0 Vote Up Vote Down EDWARD DOWLING asked 15 years ago should i feed the lawn before I aerate it or does it matter,when is the best time to do these jobs? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Feeding can be done without anything else and it is the most important action ot have a good green lawn. Aerating by spiking can be worthwhile on heavy soil but it is a lot of trouble and optional, not strictly necesssary.