I started my cuttings in mid-May. I have 6. Two of them finally started opening leaves, but the other 4 have a set of very young leaves, but have not really gone further, so I finally pulled two just to see if any rooting has occurred, and find it hasn't. No sign of rotting, so hoping there might be something I can try to get them to move along. Should I maybe make a fresh cut and remove the old wound, re-powder with rooting powder and try again? Or should I just re-powder and repot? Or should I just repot and keep hoping for something to occur? That is 4 of the cuttings addressed.

One of the remaining 2 has what appears to be perhaps a single root starting. It is fairly thick and blunt...but definitely wasn't there when originally planted and doesn't really look like what I would normally expect a new young root to look like. This one I will just repot and see what happens. (picture of root included and another to show how the new leaves appear).

One of the cuttings doesn't have any roots yet, but the bottom of the cut has started to "expand" (sorta like the middle half of the cut area has pushed out a bit), but no actual roots. But also no appearance of rot or softening of the hard cutting either, so I'm hopeful.

I should mention that all leaves were initially removed, so the short unopened young leaves have grown since potting them (these are only approx. 1 inch to maybe 1-1/2 inches), so I was hoping this was a sign of rooting, but apparently not. I will wait for suggestions before I repot.

Your cutting shown in the bottom picture has a healthy callous and already a small root showing. If you were to recut it would have to start all over again so I would NOT do this unless you have rot.
Can you show the medium you are using?
It also helps us to know what type of plumeria you are attempting to root (some are notoriously slow) and where you live and your climate.

Dutchlady1 said:Your cutting shown in the bottom picture has a healthy callous and already a small root showing. If you were to recut it would have to start all over again so I would NOT do this unless you have rot.
Can you show the medium you are using?
It also helps us to know what type of plumeria you are attempting to root (some are notoriously slow) and where you live and your climate.

All came from Hawaii and are of unknown variety * until first bloom. They are in heavy sand/potting soil with perlite. They are draining extremely well. From what I've read, I am likely overwatering (seems best is initial water and then no more until leaf breakout). I will cut back. They are destined for Arizona, but were potted first in Boise (May 15th or so), now in Wisconsin and will begin their onward southern journey toward the end of September. Loved plumerias much when stationed in Japan back in late 80's/early 90's. On recent HI trip, decided to try bringing some back as we knew at the time we would be spending winters in AZ.

From what I had read, I thought I should have had roots sooner, so decided it might not hurt to see what was going on. Since the recent unpotting, I did much more researching and have decided that 2 that showed some (albeit minimal) root growth, to repot those. Of the remaining 2, one showed some early rot, so I cut back to healthy tissue and same on the other. I will allow these to re-callous and then hit again with rooting medium, then cellophane wrap for 2 weeks, and then do a bagging attempt for rooting. I think that will get heat best to the callous, while providing minimal, but some, moisture. That seems to work for many...and for me, a beginner, will give me a chance to observe how roots form...from that, I can learn and make more educated decisions in the future.

to Garden.org

No watering until you have leaf growth!! If you are in a very dry climate you may mist them from time to time but a cutting without roots has no way to take up moisture.