Dahlia Tubers

I treat myself to a dozen dahlia tubers (large decorative) last year, and started them off in pots in my cold green house in the spring. The pot size was about 8" and the plants planted out when the frosts were finished.
My dilemma is that when they were dug up in the autumn, that the tubers have increased in size by about three times. They are now packed in trays away from frost but thinking ahead till spring I wonder how I'm going to pot them up to start the growth in the cold green-house?
Pots the size of buckets would be required.
Do I need to perhaps split the tubers up?
Suggestions please.

 

David , lots of us use the famous £1 buckets for planting up larger plants in early spring - for me mainly Cannas. The mad bagpipe shape of the Dahlia tubers can be split and some of the hanging tubers can be removed . Lots of videos on Youtube showing this. It is a skill I have never been confident enough to try. One of GC's Dahlia guhrus may advise.
I do pot mine up in a cold greenhouse , usually the last week in March.

 

@HarryS

Thank you, much appreciated . . .

 

Hi david several things you can do.
1) Pot up in large pots and replant in garden after frosts
2) Leave in trays cover with compost keep dry until spring , water and take cuttings to grow on and plant out, also planting out tubers if you have left any shoots after taking cuttings.
3) Divide and pot up. When dividing you must have a stem attached to the tuber as shoots come from the stem. Dust division cuts with flowers of sulphur to prevent disease .
you can divide in spring when you see the shoots beginning to form that way you can divide so that each division has at least one shoot.
Regards Sandy

 

Good tip sandy