I'm renting an overseeder for the fist time this weekend - I've never used one before. But now I'm wondering, how wet can the ground be before it causes problems with the seeder? We've received several inches of rain this week and the ground is very wet right now (Thursday). There is no rain in the forecast for Friday, Sat, and Sun. I need to make a decision by Friday, whether I'm going to rent it or not. Is there any rule of thumb to go by here or, does anyone have any prior experience that they can share with me?