I use cinnamon all the time when I divide/cut my orchids. I have never used it on any other plant though. When I root plumeria cuttings or air-layer plants, the rooting hormone has a fungicide/bactericide, so cinnamon is not necessary.
drdawg (Dr. Kenneth Ramsey)
The reason it's so hard to lose weight when you get up in age is because your body and your fat have become good friends.