Posted: 29/03/2014 at 18:36
Yes, artjak, that would work....last year I raised my dahlia tubers just in cardboard boxes lined with old compost bags (or binliners), and filled with compost. Not pretty but they worked fine, and a lot cheaper than pots.
And I remember that I also used lots of those thin wooden crates from the veggie stalls on the market - they were going to throw them out so I got them free - and lined them with newpaper to cover the gaps bewteen the slats, then with plastic and filled with compost. Very good - nice and strong and easy to carry.
I did have rather a large stock of dahlia tubers.... ... I've left them in the ground this year, doing it the lazy way!