sorce
Nonsense Rascal
The "correct" answer for whether to trim the top back to "balance" the top to the remaining roots has not been worked out definitely
Thought blast.
I successfully repotted mine in Summer, later Summer, without cutting the top back at all.
Of course those are summer needles. Less transpiration.
Those who repot in spring have a few weeks of new emerging needles to battle against. Sounds foolish to say it makes sense that that situation may call for a cutback for balance...sounds more like a triple whammy of death.
Better to repot when spruce is doing nothing BUT growing roots.
Unless you are battling against new growth because you tried to force a later second or third flush of growth with pruning too late.
Which is also stupid old teaching, even older than the future, because small buds alone seem to produce a naturally smaller foliage and we can get to those with one properly timed pruning every spring.
The "Spruce for Real" thread is coming.
I think the faster we let any and all outside information stop determining what we do to our trees, and rather let our garden speak to us...
The faster we will have insanely better trees.
Sorce