Stranded Deep is a survival game about exploration. Why Don't Palm Trees Grow Back in Stranded Deep? Keep in mind, though, that a palm tree sapling will never grow into a palm tree. How long does it take palm tree saplings to grow back? About two in-game days. However, it is worth pointing out that the palm tree sapling does respawn. Any tree that provides you with wood sticks does not grow back. The list of plants that don't respawn also includes the ficus tree and pine tree saplings. Though some plants in the deep-sea survival game do grow back, most don't, including palm trees.