What is the fastest-growing tree species?

The fastest-growing tree species is the hybrid poplar (Populus), which can grow up to 2 meters (6.6 feet) per year under optimal conditions. These trees thrive in moist, well-drained soils and are commonly used in the paper industry due to their fast growth and ability to quickly regenerate. Hybrid poplars are often planted in commercial forestry and are also used for environmental restoration projects because they can help stabilize soil and prevent erosion.