Dehydration during repotting
For those of you in northern areas, you may still be repotting. Or just starting. One thing that has been taught again and again is to let a tree dry out before repotting, since this makes the soil fall away easier. We are also likely to be desiccating a tree right when it needs internal moisture most. Without turgid cells, the tree will not have the mechanics to throw out new roots. If it’s already limp, it may have difficulty taking up moisture with few roots. In the ideal situation—a rainy week, or in a greenhouse with no wind and light shade, a tree with few roots will likely re-hydrate just fine. But not in less ideal conditions.
We might be making a choice between our convenience and the welfare of the tree, with this unhelpful ‘guideline.’