are any of you doing this (cool season grasses) in the spring. I can see aeration, but i have some customers interested in overseeding in the spring. the way i see it, even if i aerate in a few weeks up here and overseed, then when i do the first mow, i'll just ruin the seed. the obvious answer is wait until fall, but there are some people that are asking about it. what do you guys do in the spring. slit seed? topdress after overseed with compost?