My 'bitter end' was yesterday @WishIWasACavewoman
mine were flapping around in the wind and looked quite straggly.
in case anyone is interested, here's how to prepare dahlia tubers for storage.
Unless you live in a very warm part of the country, or can mulch like crazy, they do recommend digging up the tubers and storing them in ventilated crates, with either straw/animal bedding or scrunched up balls of newspaper not the Daily Fail
Dig them up or remove from your pots.
carefully remove the large clods of soil around the tubers.
lay them on the ground.
using a hose clean off all remaining soil so the tubers are very clean and whit, so they don't rot during the winter.
put them in a cool dry place for a week to make sure they full dry off.
* my photos are currently at this stage, they still need to be trimmed back *
lay them in the crates, ensuring the tubers don't touch each other.
put scrunched up newspaper between the tubers and lightly cover so there is plenty of air circulating round them.
check them at least monthly and remove any tuber roots that look like they are rotting. You may loose a couple of the roots, but most survive.
in Spring you can divide them up using good sharp secateurs, which will double or quadruple your stock. Replant them in April/May.