Does anyone know where I can find large bags of vermiculite in the Charlotte area?
Try Rountree Plantation.
or you might call Renfro hardware in Matthews, they carry alot of stuff.
Call Protech Environmental (on Westinghouse in SW Cltte)...they supply LS contractors with a lot of landscape materials. I was in there last week for perlite and lime...thing I recall seeing 4 cf bags of vermiculite also. Not sure of the phone # off hand, but you can google it. they also have some good mixes from Daddy Pete's in Stony Point.