sometimes, it's not you. it's the cuttings. as much as everyone try to provide the best cuttings that they have, we can't control what the tree decide to give. some cuttings will just not respond as well as others. last two yrs, i received 1 Black Madeira cutting each yr from USDA/UCD. each time, i cut them into smaller pieces and rooted them. first yr, i had 3 cuttings out of one that was sent to me. 2 out of 3 rooted rather fast. but last one didn't show any root. i put it in the 1 gal anyway after going through the motion.. baggie, cup.. and all that. it actually became the best Black Madeira i rooted. this yr, i divided the USDA/UCD cutting into 2 cuttings. one rooted very fast, but other one just didn't do anything and dried up. no idea way. there were no specific issues like gnat or anything. it just crocked.
then there was NdC. i had one or two cutting. i gave all the attention any cutting could ask for. it rooted fine, and it put on leaves like no tomorrow.. then one day, one of the leaves dropped.. then the cutting started drying up. tried everything, but it died too. i think NdC was the only thing i really wanted to root that didn't work for me so far.
have two Maltese Beauty right now in the baggie. they are hard green cuttings. i have had bad luck with green cuttings, but these look very promising. thick strong cuttings. i'll be keeping them longer in the baggie and longer under the humidity bin. but went nature want to take the cuttings, not much i can do about it :)