This is from the Knitters Review 4/23/04:
Question: I want to knit a small, decorative wall hanging for my daughter's room (exactly like making her a nice quilt, except I can't quilt, I knit!). I realize that if I hang a knitted item on the wall, the weight will start pulling down on the blanket.
I have this great mental image (and sketch!) of what I want to do, and have even been picking up the yarn for it. But I can't figure out how to hang the blanket so it won't sag.
Answer: "You can turn it into a wall hanging by making pockets along the top and bottom and sliding dowels into them to hold the hanging out straight. Whether it sags or not depends a lot on the type of yarn used. I would knit it and hang it and then watch it. If it starts to sag, you can treat it the same way they treat fabrics in museums. That is, back it with a sturdy fabric and then take small stitches scattered over the hanging to attach the hanging to the backing fabric. That way the weight is born on the backing fabric instead of the hanging and the hanging will not sag forward. Use a thread to attach it that matches your wall hanging like a thin yarn or embroidery floss rather than sewing thread and avoid the clear nylon thread. It won't show like the others will but you run the risk of it cutting through the yarn. stitch in rows from the back of the backing fabric. Take a tiny stitch through the back of the knitting only, put another stitch right beside it and then skip 2 to 5 inches and make two more stitches. Cover the entire back doing your stitches in rows. If at some time in the future you want to use it for an aphgan or throw, it is a simple matter to snip these sewing threads and release it from the backing."