Good advice from Mariedav, me if it grows then I am lucky, if it don't thats what I expect.
The other thing is you are coming to live in Spain anyway so why let some kill joy ruin it over some vegetable troughs etc, if you take to much notice of what many say then nothing would have ever been done, past or present, where's the lack of water for instance, you do have a tap, don't you?
Bring them, do your own thing, if it works great, if it don't the only thing you can say is "At least I tried" which is a whole lot more then the killjoy would have done by the sound of things.
Good luck, I know Suffolk very well, just don't expect the same amount of rain though.