What I meant to say is if you are just doing the same stitch on each side that is what makes the garter stitch. If you are just doing th knit stitch you can get the garter stitch when you flip the piece. To make the stockinette when you flip side you will do 1 side knit and the other side purl. You change the direction of the needle. Then you get the stockinette on 1 side and it looks garter on the other. I hope it makes sense, if this is what you are asking.
Blue Mound, Ks