Hi,
I was thinking that myself but are they that more expensive than the mainland, council allotments would be £50 a year at most although there is a long waiting list to get one, private allotments I'm not sure about.
But the site at Eden has 4 fields filled with plots with one field dedicated to organic growing.
Theres sites at Annadale, Ards, Belmont and of course Eden, that's the four big ones I know about but I'm sure theres more and if anybody knows of anymore please let me know.
Good luck everybody
stevie gee