I don’t know if this helps, but we use glad bags, root riots, indole 3 and aloe. It takes 5-15 days pending the thickness of the cut. Heat and humidity speed up rooting along with the rooting hormones. As long as spring water is used, over 90% success rate
Irie Genetics makes an F2 dedicated to Subcool. Chagrin Valley Hemp in OH has the actual Subcool packs still in original packaging. I also have old stock of Cleaner crosses….maybe vortex