Planting trees in Oceania is critical for preserving unique ecosystems, protecting biodiversity, and adapting to climate change. The region is home to some of the most isolated and biodiverse islands on Earth, including the tropical rainforests of Papua New Guinea, the coral reefs of the Great Barrier Reef, and the ancient kauri forests of New Zealand. However, Oceania's ecosystems are under increasing threat from factors such as deforestation, invasive species, and sea-level rise. By planting trees and restoring degraded habitats, we can help reverse these trends, restore ecosystem function, and ensure a more resilient future for both people and wildlife in Oceania.