How long before stitches are removed after a hysterectomy?

Stitches disolve. In the vast majority of surgical cases your surgeon will use dissolvable sutures (stitches). These will not need to be removed.
Stitch removal. Usually with abdominal operations, stitches are self dissolving, and do not need removal. They can otherwise be removed about two weeks after they are placed, but your surgeon is best qualified to tell you when it is safe to do so. .