Whoa whoa whoa, still gotta work on getting into orbit first, figure out what to do with the plant later. Like dharak said, we need to stick to experiments in earth orbit first. Also, how will we fit a plant in a 2U (even 3U) cubesat? how do we keep it alive? We will need to expose it to the sun for photosynthesis, but without the atmosphere the sun might kill it anyway. and how do we protect it from radiation? what about the temperature? will it even survive in zero-gravity? I say that having a plant is just too complicated. Stick to analysing the atmosphere and earth's magnetic field. (sorry if I've missed anything, I'm new to the thread)