What a great question. My mother is retired from Park Seed company, the suppliers of seeds for the Seeds in Space program. That doesn't qualify me to answer the question necessarily, but I did know where to start looking because of it!

Mostly, seeds are taken to space and brought back without being grown up there. However, a few basil seeds have been grown on the International space center. Based on the pictures and video, the plants grew out. The growing chambers were affixed to a wall and the plants just grew out from their container.(Sorry for not being able to embed)
http://www.nasa.gov/mov/209112main_sts118_growing_plants.mov

The experiment was only 20 days, and in the end they overwatered the little guys so they "deteriorated".
Source(s):
http://www.nasa.gov/audience/foreducators/plant-growth-gallery-index.html


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