I may add my experience on rooting Catha Edulis cuttings.
End off august i moved them indoors and took some cuttings because they took some cold, and i wanted to save the plant.
I took peatpots, filled with coir.
Placed on a south-side window and kept slightly humid in a rootingbox.
After one month, the first new leafs sprouted
After 6 month this is what they looked like
The roots passed threw the peatpots when i repotted.
I simply dug them with the pots in ordinary soil.
i didnt used any rooting hormone or fungicid.
Success Rate nearly 100%
Hope someone may find this post helpfull.
Love
Pflanzenfreund
PS: Wanted to add this post to an older topic, but the board told me opening a new topic would be a better option.