I have just had 1 of the junipers I dug from the grow beds in July turn yellow - Almost certainly dead now.
Many trees can put out new shoots with the energy stored in the trunk but if they do not also put out new roots below then death is inevitable.
I have had some with green shoots for almost a year then suddenly turn yellow. After checking the roots usually find no new roots.
As some of the others have said, juniper seem to need plenty of green leaves to provide food and hormones needed to start new roots. May be better to leave more on top than less if you want them to survive transplant.
Still hoping yours will pull through but you probably won't know for 6 months or more
