David Hill wrote:
It's strange, we always seem to plant potatoes in the spring.
Every year we get potatoes that have been left in from last year coming
up before those we plant, so why don't we plant them in the Autumn?
Discuss.

Presumably because if the foliage comes up too early, it'll get frost
damaged. Which happened to a lot of our allotmenters a year or two
back when there was a very late frost.