i use rockusing canna rizotonic or reganaroot.these products are gold to make good root structure.try these and see lots of white root.even use rizotonic as foliar spray on cuttings.for real mate you try and see.if using areoponic propagater only use for 15mins per day using tank heater or heat mat to sit tank on.if this helps you let us no.peace gman corby town....uk!!!!!