- Empress or foxglove tree (Paulownia tomentosa)
- Not Applicable ()
The world´s fastest-growing tree is the empress or foxglove tree (Paulownia tomentosa), named after its purple foxglove-like flowers. It can grow 6 m in its first year, and as much as 30 cm in three weeks. Native to central and west China, but naturalised now in the USA, this large species also produces 3-4 times more oxygen during photosynthesis than any other known species of tree.