Dahlia foeniculaefolia or Dahlia foeniculifolia
Has anyone any info about this plant? I obtained it from a nursery in the UK specialising in rare plants.
Healthy specimen, no flowers at the moment, Nurseryman insists that this a Dahlia, but to me, foliage resembles Bidens or Cosmos. No tubers, just a huge brown ...don't know what to call it...swollen hard thing, with small roots extending.