Just scratching the surface of this yet and have not tried it myself, but I came across this info on a french iris forum, so just thought I should pass it along. I then got a link from there to an article about cactus culture,
https://www.cactuspro.com/arti... (in french, scroll down some to see the part about cinnamon).
I've started to search a little about the subject and it seems cinnamon and cinnamon oil has gone through some scientific testing when it comes to potato tubers and soft rot.
Various methods of application from dusting the cuts with cinnamon, soaking tubers (rhizomes for us) in it, spraying foliage as a preventative, watering soil and so on. I don't think it works simply mixing cinnamon powder with water, but I could be wrong about that. The cactus article suggested using acetone as a solvent. Some of the scientific potato articles I've seen suggested ethanol.
As I said, I haven't tried this, but would love to find out more . Maybe someone has already tried this?
