Clonex Purple is for medium wood.
I have found that most difficulties in growing cuttings arise from under or over watering, incorrect light, overheating, poor air circulation or unsuitable growing medium. I am not convinced that hormone is to blame for as many failures as people think.
jamie111 wrote: i am interested in your very large automated system that is easy to build mate

wheres the pics?jamie

Never mentioned it was easy to build, but yeah it was!!
I wan't to do a full page technical article on the old heating and mist system (which still works pretty well) and the new system, which was inspired by a $70,000 commercial propagation house.
The new enclosure is 4m x 1.2m x 1.5 m tall and cost less than $1000 for a 4500 cutting capacity. I plan to add a couple of things to it this year which will enable almost full climate control.
Cheers
MM