The message
from Roger Van Loon contains these words:


As soon as you and the British gardeners come
up with a better winter hardiness system (even if only for the UK),
I'm sure it will be a howling success. Why haven't you?

Probably because, as many have tried fruitlessly to explain to you,
our combination of latitude and small islands' maritime climate makes
nonsense of generalities within the space of a couple of miles, as Pete
explained.

If you haven't
found one - why complain?

I haven't seen anyone complain about not having one, merely point out
to the OP and overseas contributors that the USDA zone system has not
been found to be useful in the UK.

Janet