For the next sample, I tried a folded hem. This was complicated by the fact that the fabric will be used on the purl side. Normally a folded hem can be created by casting on on waste yarn, knitting rows for the hem, then rehanging the stitches and continuing to knit. If I were to follow the usual method here, the hem would be turned the wrong way and wouldn’t show the same texture as the rest of the fabric.
To resolve this, I cast on with waste yarn and then knit 30 rows in ladder lace and then changed back to waste yarn and removed the sample from the machine. I then turned the piece over and rehung one edge on the machine with the “right” side facing towards me. I then folded up the hem and rehung the other edge onto the same needles and then continued to knit.
The result gives a continuation of the pattern and a neater edge, but because of the double layer, the hem is more opaque than the rest of the fabric.
This might be the best solution, but the hem is a bit bulky, so I think I’d do a few more tests before settling for this option.