A. We use vague terms such as “medium height” to describe Paulownia because the variation can be great depending on the conditions. There is record of an 80 year old Paulownia reaching about 50m tall and over 2m trunk diameter. More commonly they will settle for around 20m. Under plantation conditions they will be anywhere between 8 to 15m when harvested for timber. Many park or garden specimens struggle to grow more than 10m.