Punxsutawney Al must not have seen his shadow when he got up this morning
He is right that when you have a lot of trees you need to start the repotting process as early as you can to keep up with all the work. Everyone's climate is a little different, though.
My Japanese Flowering Apricot [i:884e940d76]Prunus mume[/i:884e940d76] is at the peak of its bloom right now. That means it is ready to be repotted in the next couple of weeks, any longer and it will be pushing leaves. That is, unless it is hit by frost during that time.
Wisteria flowering is said to be an indicator of the best time to repot Japanese Black Pine. Most wisteria flower twice a year. Once in spring and once in late summer. In Japan, they do graft and repot successfully during that summer period, but it is exceptionally hot and humid there at that time.
No such luck here in San Jose.
Regards,
Matt