This video nicely explains the current research being done on growing plants in space. The surprising role (or lack thereof) of microgravity, potential for plants to penetrate soil (and possibly being able to use plants as water taps), and other interesting topics. Below another video from NASA about their instrument VEGGIE, which is like a super-advanced (and super-expensive) AstroPlant instrument, and the plant types and cultivars that are currently being researched and selected for research.
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