Scarlets Cut Flower Patch 2022/23/24

I don't faff with my dahlia tubers that much. My process is: dig them up, leave them somewhere to dry a bit until most of the soil falls off, trim off the straggly roots then chuck them in a cardboard box, store them in the house somewhere cool, give them a half-hearted check at some point if I remember, replant in spring.

That's pretty much what I do.