The Christmas custom of decorating front doors by hanging wreaths on them seems to have developed in the United Kingdom during the closing decades of the 20th century, presumably as an importation from North America.  It is now common practice and although wreath-making workshops are available it appears that most people use shop-bought decorations.

Images: Smith Street, Chelsea, London, where 17 of the 49 front doors were decorated with wreaths; 16 December 2014.

19 December 2015:  Visited Smith Street again, about 50% of the front doors were decorated with wreaths, not all of them of plant materials.