You have to understand a bunch of things; I have been dealing with questions and the postings of a lot of people on a lot of questions about Mugos, I do not have the time to follow a thread like this one back and search for a previous post. I'm sorry about that,-- but I am not able, my memory is not that sharp any longer and I don't have total recall of every post and every person who posted. So here is what I see considering your additional information. You dug these trees up in February and they were essentially bare rooted? Considering this, I would think they are doing quire well. You need to give harvested trees at least a whole year, two would be better,--- to recover and get accustomed to container living.
It seems every time I am informed of a problem I usually find the source of the problem if I dig deep enough. There are a number of things that can have significant consequences, things that may seem inconsequential, may have life and death results. So if I start asking questions it is for a reason.
So for all of you that are seeking information because your tree seems to be in difficulty there are a lot of things that can cause a Mugo to go south. But; a lack of information will automatically trigger an abundance of questionsfrom me. Another thing is that you guys have to understand and consider----if you are asking for advise it is best asked prior to the event not as an approval of your actions after ward.