Aeration is one of the most important processes to the turf area.  This process helps strengthen the root system and the growth and well establishment of each plant.   At the same time the process recycles, aerates, and loosens soil mixture of organic elements.   Aeration is recommended one or two times a season mid to end of Spring and beginning of Fall.   The first one gives the biggest impact because the plants are still in the growing stage to best develop before seeding which happens in warm months.