I have a potential new customer who has a new hydroseeded lawn. The top soil is **** (lot of stones and silt/clay) so the growth is sparse but tall (about 6 inches). I had to be careful not to scuff it just walking on it and can't imagine what my 48 inch Exmark WB would do to it. My question is, when should new lawns like this be mowed, and do I have any other choice but to mow it with my trim mower to avoid ripping it up? He wants a price for the rest of the mowing season, but I'll need to charge more to mow with a smaller mower until (if) the lawn gets established.