Drought-hardened potato seedlings are better at surviving drought stress. Drought stress harms seedlings, but drought hardening helps them keep water, photosynthesis, and chlorophyll levels stable. It also stops electric conductivity and malondialdehyde levels from rising. Hardened seedlings have stronger roots, more antioxidants, and higher levels of helpful substances like abscisic acid and proline. Their leaves have more stomata but less transpiration, making them better at using water. The changes in leaf structure also help them resist drought. Overall, drought-hardened potato seedlings are more resistant to drought because they have more protective substances and better ways to use water.