12 days after planting Kentucky Bluegrass, I just had a lot of rain. Many spots had already germinated such that the green grassy shoot is about 1/4 inch long, with roots just barely into the soil, but that baby grass is now mostly lying flat/sideways (somewhat due to the heavy rain, and somewhat due to my placing a heavy tarp on this area to shelter it for part of the rain).
Should I now topdress these uprooted seedlings with soil (like 1/4 inch) to help them reestablish roots? Or, will the topdressing block light and therefore wind up killing my already-sprouted grass?
A little more rain is expected today and tomorrow which I believe would be perfect for normal watering. But, even with normal watering, I worry about this sideways baby grass lifting and floating away. Should I topdress, do nothing, put the tarp back down, or what?