[Pfhreak]

Potatoes are an interesting case, but they require rooting around through soil to harvest. (Having grown potatoes in my garden last year, it was a much messier endeavor than my greens.)

I'm not sure we're ready for all that soil to be floating around in the ISS, literally mucking things up. Not saying it isn't possible, but why not use lettuces to solve all the 'simple' problems about growing things in space first.

Also, don't discount the quality of life improvement of eating some fresh lettuce.

[eutectic]

Aeroponics or hydroponics would help eliminate the mess issue.