This grower is fairly sure of this plant identification.
Well rooted side shoot taken earlier this year
Paulownia tomentosa (Empress tree). This is a spectacular tree with tropical leaves and violet coloured, fragrant flowers which form in the autumn and open the following spring. They are about 5cm long. The leaves are about 15-30cm long and light green.
They grow in well-drained, fertile soil, with ample moisture in summer. Needs shelter from strong winds. Fully to frost hardy.
Specimen and interesting leaves. Spring interest.