I had some hems to do on knits this week and wanted something new. I usually avoid stretch stitches on my machine because they are so much slower than straight stitch, but one of the stretch stitches is a feather stitch. I like this stitch in hand embroidery, so I tried it on a scrap of my knit fabric. I loved it!
It's only a little slower than my regular zigzag stitch and the resulting hems are beautifully finished in a single pass. Just trim the hem allowance near the stitching on the wrong side.
I hemmed the sleeves of a cardigan with matching thread and the bottom of a knit top with black thread. Both look good to me