Someone posted last week (?) about a non-curling cast on edge. Seed stitch, ribbing, etc are good choices. Meg Swanson also recommended a hem - which can be added after completion of the garment. I have added on borders and hems to completed garments to correct the dreaded curl. I haven't tried her "purl when you can" method. I found this method in her book Knitting with Two Colors. She is discussing this method when you are using 2 or more colors. From her book, page 17 "A relatively small smattering of purl stitches are required to produce a fabric which will lie flat. .... to avoid the wrong side blips only purl a stitch when it lies above a same-color stitch in the preceding round. ... Work for a minimum of 2". Has anyone tried this method?