"K" wrote in message
...
I'd like to grow a quince (Cydonia) but not sure whether it'd fruit for
me. I'm in Yorkshire, 400ft above sea level, on clay in a slight frost
pocket.

I live in Australia and we get savage frosts. We've had temps down to -9C
and it has had no impact on our quince at all. Our biggest problem with it
is pear and cherry tree slug.