Head lettuce might make sense since it needs a lot of packaging and refrigeratoration to get to market. I can imagine a vertical system where it's grown in its

Head lettuce might make sense since it needs a lot of packaging and refrigeratoration to get to market. I can imagine a vertical system where it's grown in its clamshell, not dissimilar to some head lettuce you find at the store. It's gotta be in a refrigeratorated truck or car for the journey. It's also in pretty high and constant demand. For pretty much everything else though...