I'm in the process of seaming up my first sweater. Finished knitting it over a year ago but was scared to seam so I tucked it away. I decided the other day that I wanted to finish it and pulled it out. Only problem is that it is done in garter stitch and I can not find any information how to sew the shoulder seams together. I now how to do the mattress stitch for garter stitch for the side seams but nothing on the shoulder seams.
What's the best method for seaming shoulder seams in garter stitch?