Quote from NASA: "Space Flower! NASA astronaut Scott Kelly, who took over care of the zinnias aboard the space station after the plants weren't thriving from growing procedures on the ground, such as scheduled watering days. Kelly told the ground team, “You know, I think if we’re going to Mars, and we were growing stuff, we would be responsible for deciding when the stuff needed water. Kind of like in my backyard, I look at it and say ‘Oh, maybe I should water the grass today.’ I think this is how this should be handled.” And so, Kelly became an autonomous gardener aboard the space station. Today, the zinnias are thriving!"
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I'd LOVE the opportunity to grow flowers in space. What fun!