For those that want a ballpark idea of what size Trichocereus is still very easy to root. These were simply left out to dry and formed roots. Placing them on top of moist soil after 24-48 dry spell would of course sped up the rooting process as would a heat mat.
Wakinyan attached the following image(s):
cutting3root31.jpg
(586kb) downloaded 48 time(s). cuttingsmall2root.jpg
(1,091kb) downloaded 47 time(s).When I graft you graft we graft