If you can crochet you can make a blanket stitch edging that does not require you to keep joining on a new thread. You will need a very fine crochet hook to pierce the fabric, or if your fabric is fine woven make the holes first with an unthreaded large size needle on your sewing machine, about half an inch from the edge & your chosen stitch length. Then using the crochet hook you just pull a loop of your chosen blanket stitching thread up through the hole until it reaches the edge of your fabric, hook another loop through, make one or two chain according to your desired stitch spacing and then dip your crochet hook down into the fabric again to form another blanket stitch. Yes, this does make a double legged blanket stitch, with a chained edge, but is very quick to do & no need to keep starting a new thread. To finish off cut thread & pull through the last chain, thread a needle & make a stitch around your begining stitch & fasten both ends off securely, hidden in fold if you have made one. WARNING: do not use this edging on a baby's blanket. I had to rescue my youngest from the unravelled thread she had managed to wind around her neck when a commercially made blanket with this finish came undone!