My yard had the sod placed in early December in Omaha NE, the sod was dormant, shortly after being laid the we got a hard freeze. Anyway the grass came through very well this spring the only bad spots are where the sod was laid over large weeds. I did put down scotts crab grass prevent starter fertilizer in the first of April. Grass is really green. I do plan on applying some more fertilizer in June. I am wondering if I use what scotts recommends or maybe a store brand like Ace nitrogen mix. The areas of the lawn where the water runs you cannot see the turf lines, I would say it will take a year for all the lines to disappear.