Rewton? I lost many cuttings to bad rooting, so I started planting my roots into the cuttings to see if worked - initially to make the cutting stay alive for me and secondly to make it be strong like my 22 y.o.tree.
Some cuttings soon after I graft the root start the roots in and around the incision of the new grafted root and also the root grafted. Others the grafted root takes off and it heals quickly forming a ring of callous on the cutting.
Upon putting them in cups, sometimes, I trim the grafted root as they don't fit in the cup, and the root seems very alive and attached, so I just release the tie bands, others with significant roots like these, the grafted root did not have much of new growth, but it was very attached to the cutting, so I trimmed and planted.
I don't water the cups anymore, I make my mix of perlite, soil and moist it outside, so i see how much moist is through the mix. Seems to be working.
These cuttings' sibblings have no root signs whatsoever - they went in the box together, so the grafting of roots speed up the process for sure.
Looking fwd to try other grafting methods like these in pictures I found yesterday. This is very instructive for my craving!
http://rfcarchives.org.au/Next/CaringForTrees/RootGrafting9-91.htm