Well a few things, here in the States, the nutes at home depot, don't cut it. As far as, oh they know what I'm buying this for. So the fuck what! Do they know you? Do they come over? Than who cares. Plus if you worked that job are you really that concerned with what some customer out of hundreds that day is buying, not likely.
But yeah, if you want to get nutrients online (which you'll get better nutrients IMO) check out Advanced Nutrients, great stuff.