Posted: 16/07/2013 at 09:39
I live in France. Here it has been down to -17° in winter and up to 35°. My shrubs that have survived without problem are - Forsythia, Weigela, Kolkwitzia, Kerria Japonica, Viburnums, Cotoneasters, Berberis, Deutzia, Philadelphus, Caryopteris, several different Spireas, including Anthony Waterer and Bridal Wreath, Exocorda The Bride, Choisya (sometimes a bit of frost burn, but recovers in summer), Buddleia and Pyracantha. I probably have others, but that is what I can remember.