Re: seeding problems in the month of May?
You can seed anytime that the temperatures are not too hot where it will dry the soil out, resulting in poor germination or crop loss.
I am a big proponent of sod because it is literally "instant" lawn. You only have to be careful with it for the first month or so until it can get properly rooted, then you can pretty much do whatever you want on it without fear of damage. Seed will take a very long time to come in fully and get past that "delicate" stage. You will not have a yard to enjoy this summer if you use seed. The biggest factor with sod is the initial expense, but beyond that, it's far easier to do than seed, with no special after-care needed.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!