These are Western larches that are having the problem per photos. I have other smaller Westerns that are growing well and not having the same problem, and they are getting about the same sun. I also have some smaller Japanese larch that are doing well and still growing every day it seems like. I did not mess with the roots at all last fall or this spring. If I feel down inside the pots on the larger ones with the problem, they are damp. I am beginning to think the heat into mid/high 90's and maybe a root problem.
Help and ideas appreciated.