Thats a good read

myself i worked in a bonsai shop a long time ago an we repotted all yr round just avoided the really hot days an all trees went into a sheltered area misted daily. After care is the key thing here we did lose some but when u do 100s the odd one here an there wasnt worried about will say tho they where all young trees an where wired to shape at the same elms ash juniper procumbens etc.
With my group planting it was my 1st one ive tried to do in 15yrs

wasnt till i took the picture that i noticed the spacings

will try to adjust them late winter be doing some

as they can be difficult to get looking right
