A forestry hybrid, with a long straight trunk under suitable conditions, and a narrow crown. (Bio Tree 2022).
USDA Hardiness Zone 7
RHS Hardiness Rating H5
The parentage of Paulownia ‘T121’ is P. (elongata × fortunei) × tomentosa (Bio Tree 2022), and it is recommended by the Bulgarian company Bio Tree Ltd. for its vigour and ability to grow a long straight stem, in warm-temperate conditions.