In July 2021, NASA astronauts aboard the International Space Station started growing chili peppers in the Advanced Plant Habitat, as part of the Plant Habitat-04 (PH-04) experiment. In July 2021, NASA astronauts aboard the International Space Station started growing chili peppers in the Advanced Plant Habitat, as part of the Plant Habitat-04 (PH-04) experiment. Space Exploration Phys.org – latest science and technology news stories