The fabric is a knit, so it gets fairly heavy when wet. I actually made my own starch at home as well, using a recipe I found at How About Orange. In hindsight, both these factors may have contributed to my downfall. Oops! But it's okay because I now have my tree successfully on the wall now though! I chickened out on the glue, and ended up using a combo of good ol' scotch tape (to keep the tips of the branches down) and 3M poster hangers (thanks for the suggestion).
I still need to prove to myself that this is possible, so I'm going to try again with lighter weight fabric on a vertical wall with a different pattern.
I'll post a picture in the completed projects section soon.
Ooh, I'm glad the suggestion was useful! Can't wait to see the pics.