In article ,
Jeff Layman wrote:

There is no chance of cold in the UK (even in north Scotland) killing a
Wisteria. It is much more likely that something else killed it. One
possibility is graft failure (which I grant may be exacerbated by
frost), but even so if you leave the "dead" wisteria in the soil you
will find that after a year shoots start appearing from the rootstock.
Unfortunately they will be of no use for ornamental purposes!

Yes, in the strict sense. But the way that frost kills many plants
in the UK is by damaging the tissues and giving fungi an opening
while it is above freezing but too dark and cold for the plant to
start growing. It's really our wet, dark but not frozen winters
that are the problem. I'll bet on something like that.


Regards,
Nick Maclaren.