About 15 years ago I found a tree peony at Loblaw’s  for an incredible price, $17 at a time when the nurseries were selling them for $40-$50. I doubted it would be hardy but I planted it where a stone wall would protect it from the North winds and it would get morning sun. Later I had to move it, not far, and in the same bed, but it took at least two years to recover. This winter we had too little snow to cover it, and there was die-back on the stems.
But today, all those years later, its blooming again.