Butterfly bush 'cube' buds

Native to central China and Japan.

All these years until now and I've never noticed that the flower buds of Buddleja davidii have a cubed appearance. I've included the opened flowers on the inflorescence to show development/opening.

This plant is a major naturalised environmental weed here in Australia. It's why I have never grown one, despite being a magnet for butterflies and fond memories of my father growing them in England.

By chance, I sourced a sterile, dwarf cultivar, part of a series of plants developed by Thompson & Morgan of Ipswich, Suffolk, England. More than 800 hybridisations were made and 25,000 plants grown out in fields from which the final plants were selected. In all, it took 10 years to create the first marketable clones of Buddleja Buzz.

This is Buddleja davidii BUZZ 'Ivory'.