NASA has been exploring using 3D printing technology for various applications, including printing tools, parts, and habitats for astronauts to live and work in. The technology has been tested in a microgravity environment aboard the International Space Station (ISS).
NASA has also been researching plant growth in space, including using hydroponic systems and LED lighting to grow plants. These plants can provide a source of fresh food and oxygen for astronauts during long-duration space missions.
While 3D printing trees in space is not currently feasible, the technology and research being conducted by NASA and other space agencies could lead to future innovations and advancements in space exploration and colonization.