basic gravity system

[Brian]

I have just assembled an basic gravity system utilizing a 5 gal. bucket and a 6"-deep, 1' by 2' tub. Everything is in place and ready to go, but I am not certain which veges/plants to put in this tub. My concern is with the depth of the tub: will it be deep enough to supply tomatoes all the room they need to grow? What about peppers? Can anyone suggest a vege that will thrive in that environment??

Thanks, Brian