I have about eight different dahlias, and I left every last one outside over the winter. But this one…
It was planted late last year, never did much, and I knew it wasn’t planted deep enough at the time. I did have a go at digging it out, but it didn’t want to come so I left it.
It is in a deep pot with tulips and ornamental variegated ivy (unknown variety, I found a bit on the pavement/sidewalk that had broken off from a planter, and made it mine) . The tulips did naught but one bloom this year, but I didn’t expect them to. The ivy was going crazy last year, but looks horrible this year.
The dahlia, however, looks like maybe it has a virus?
Other dahlias in pots, thriving and budding within less than a foot of this one are just fine.