How to Propagate Berlin poplar?
Propagate by hardwood cuttings in winter and suckers in autumn or late winter

Berlin poplar · Populus × berolinensis
Cultivated for their very rapid growth as specimen trees. Useful as windbreaks. Tolerant of any soil other than constantly waterlogged soils. Avoid growing within 40m of buildings as the vigorous root systems may damage drains and foundations, particularly on clay soils; has the potential to become a nuisance
Propagate by hardwood cuttings in winter and suckers in autumn or late winter