Well, from my experience at the nursery, be ready to water them well during dry periods, since they are not very drought tolerant with a restricted root run. Wilting during or shortly after flowering can ruin the crop for a year, and wilting before or after this period will reduce the crop drastically. Also, as usual, plants in containers need more consistent fertilization than plants in the ground.

what sort of size bins do they need? I will have a sunny-no man's land- space that might just take a razzer or two...do you have reference for that article?

Thank you for your advice Tugbrethil, I'll make sure I water and feed them regularly.

Wedgie, the article by Robin Lane-Fox (Financial Times March 2/3 2013 House and Home Section) suggests using galvanised dustbins with holes punched in the bottom, but I am going to use a plastic potato bin.