I have recently purchased a used ryan lawnaire 4. I was wanting to get comfortable and confident about the machine before offering services next year. I am being advised by a very knowledgeable man and he is telling me to aerate in july. I am a bit skeptical even though he has never lead me astray. I maintain all warm season turf. I am in coastal zone 8/9. golf courses have been doing it the last few weeks and some are about to start. Large landscape company does it in march, along with one other smaller operation. Does any one have any experience with what I am speaking of?