Hey there! I went to HS in Clemson, and I know the area pretty well.
The best(est) closest grocery store that I know of is Earthfare in Greenville SC, which is 45 minutes away. Now, there could be some good natural stores in Anderson SC, which is closer, and I would check the phone book to make sure, but I doubt it.
Clemson is always growing, so if there is a new one that I'm not aware of, it would be right there on that Tiger Blvd stretch.
The BiLO is nice in Clemson also, and I'm sure they would have some organic foods. That is probably the easiest solution.
Mom to three boys 7/7/00 11/20/02 and 10/29/2011
Writing at: http://paisleymama.blogspot.com/ and other places!