The Tubers That Will Not Die.
With roses and delphiniums, I know what I'm doing, but with dahlias, not at all. I did nothing to last fall's dahlia tubers except wash them off in a mild bleach solution and let the large clumps (uncut) lie in a shallow cardboard box in the basement, putting off separating the tubers, thinking I might not have dahlias in the garden this year anyway. Things in the only available bed had gotten too crowded. The tubers must have thrived on neglect; now there are two inch green shoots on them!
You guessed it. Now I have found a place to plant them and wonder if a few can be saved. Do I plant last year's whole "mother" tuber or what?