Just wondering what you consider the best time for wiring Ezo? I wired mine in the late fall two years ago and it reacted very badly, dropping needles and stressed out. It is recovering nicely now but will need wiring in the near future.
It may depend a bit on location too, the reason why I prefer not to wire in spring and summer is because it can get hot in this area, so they need to get easy traffic between roots and foliage. It’s also easier to damage the foliage I find in that time.
Foliage is something you need to be careful with when wiring, even small damages can lead to browning. For me any time from late fall seems no problem. Why you had bad result I don’t know, perhaps it got dry around that time? They love water, in nature they often grow in swampy areas, Did you wire it inside? If so you may need to spray the foliage now and then during wiring. How did you overwinter it?
The very best place to store them in winter is outside under a layer of snow.
That’s not something I can do but also during winter I try to not keep them in sun and make sure they don’t dry out.
My friend in Hokkaido, doesn’t really wire Ezo in winter, I think because too cold. It often gets too minus 20 Celsius. The only trees he seems to loose are the one that we’re kept inside in winter. It gets cold in that place but also dry and Ezo seems to be rather weak for that even in winter, normally he sprays also foliage daily or even several times a day but seems sometimes still a problem. (He has the bonsai shop so can not keep everything under the snow all winter)
He started wiring Ezo trees I think since few weeks back, and he does almost till end of year but even his location summer is not the best time, end of summer seems to be ok again.
He also does repotting of Ezo often end of summer, and that seems to work out very well.
According to him even better then spring.
If they are not big heavy bends you are probably just fine to do it now, I assume there will be still a few weeks before they start growing if the tree was outside in winter.
Most important I find I keeping them moist, especially after wiring
Good luck
Grtz