Fastest-growing tree (by weight)

The fastest-growing tree by mass is the coast redwood (Sequoia sempervirens) native to California, USA. An intensively measured 3D model was created of an extra-large specimen located in the protected Redwood Experimental Forest in northern California (which is off limits to the public). It was found to be 546 cm (17 ft 11 in) in diameter and 98 m (321 ft 6.3 in) tall. Increment cores, which were collected throughout the tree and then linked to the model, showed that during a six-year period (2012-17), the giant tree put on an average of 1,130 kg (2,491 lb) of biomass per year.

The current tallest living tree is also a specimen of coast redwood, named Hyperion, located in Redwood National Park, California, USA. First discovered in 2006, it stood 116.07 m (380 ft 9.7 in) tall when last measured in 2019.