The Bougainvilleas of California are mindboggling! The ones right at the coastal areas fare well in Winter freezes here like around Port Orange or Daytona for instance, ( I think its the saltier air) Yet we Central Floridians know that if a good long freeze happens, we have lots of thorny refuse to deal with in Spring before the new growth comes back from below!
Yet they grow back fresh, new and beautiful. That is something I believe Canadians would be happy for. All zones have their ups and downs before they're up again I suppose...
Love your gardens!
David