Food in space

I think the question should be formulated a little bit differently. Will we grow food in outer space some day or when living in space we'll use another way for feeding our bodies?

 

There are a few serious technical obstacles to growing food without gravity. The main one that I know of is that water does not stay in contact with the roots; the flow of water in a porous medium without gravity to drive the flow is almost totally driven by surface tension and diffusion. This results in the roots drying out as the local water is absorbed. Plants that use nitrogen-fixing bacteria have the additional problem of gas bubbles forming around the root.

Then there is the matter of growing plants in a self-contained biome: the results of Biosphere 1 and 2 (potentially useful experiments) are telling.

http://en.wikipedia.org/wiki/Biosphere_2

Also the amount of space and resources (light, heat, water, etc) required to grow and support sufficient crops is (currently) out of proportion to the benefit. Then there's the matter of pollination, use of pesticides/fungicides (it's hot and humid up there...), and what to do in case the crops fail.