It is an age old dilemma how and when to lift dahlia tubers, it's almost
like how and when to prune roses.

A very full, comprehensive, and helpful post.
Thanks

I will second that comment and thanks. I am just wondering what to do with
my first ever dahlia. (Bishop of Auckland) It is in a dry sheltered spot
near the house and I was toying with the idea of leaving it in the ground.
How much wet will they stand over winter? (I am a few miles north of Bodnant
Gardens in North Wales)
T.