Hello, some news of what happened to this tree this year..
I repotted it this spring, with also a few thread grafts (to add branches, and to add roots) ->
2 thread grafts on the back of nebari (to add roots) with a tourniquet (to produce roots) ->
On the nebari of the front, i added 1 thread graft (to add roots too) with a tourniquet ->
I also performed other thread grafts on the trunk, to add sacrifice branches (to improve tapper) on the site of the scars (to not create new scars) ->
Only 1 graft on the soil level (with tourniquet) survived (33% of succès, not so good, but better than 0% succès that i add up to now). All the grafts on the trunk survivent but didn't grow this summer.
Here is a pic of the tree yesterday : very good growth this year ->
The back side of the nebari, where 1 graft survived ->
The grafted branch that made roots is on the right side of the pic (with the tourniquet) ->
the bark color changed and it made some roots ( = succès ! finally) ->
new granular substrate, with osmocote + HB101 ->
Now, after so many failures, i know how to add roots on a JM cultivar. Very important for me
Next spring, i will perform 2 grafts without any tourniquet, hoping that they will survive and produce roots naturally (without tourniquet) ...
To be continued ^^