I like to attach knit on lace edging counterclockwise around my center. I also added and additional stitch on attachment side to match my center patterning more closely. Additionally, my attachment stitch is K 2 together rather than the traditional knit thru back loop of edging. Seems to lie flatter. The k1 at the end of all odd rows is really the K2 tog attachment stitch.
Shown with a cast-on count of 19 stitches.