How do astronaut keep plants alive in space?

Astronauts keep plants alive in space by using controlled environments that mimic Earth conditions, such as temperature, humidity, and light. They utilize specialized growth chambers with LED lighting to provide the necessary light spectrum for photosynthesis. Additionally, they carefully manage water and nutrient delivery through hydroponic systems, ensuring that plants receive the right amount of resources without the influence of gravity. These methods help maintain plant health and growth in the unique challenges of microgravity.