How long does it take to grow a royal poinciana tree?
Cultivation Notes: Royal Poincianas are fast growing trees when they are young. They are able to grow up to 5 feet of height per year (7). Trees rated as fast-growing were at least 25 feet tall after 10 years. These included the American Elm (Ulmus americana), Silver Maple (Acer saccharinum), and Sycamore (Platanus occidentalis). Moderately fast-growing trees measured 18 to 25 feet tall.