What do you do in winter to winterize and how cold does it get there on average?
I grow Hybrid Tea roses in Mn and have lost more either moving them or due to careless or too early uncovering in the year than any other reason.
By careless I mean I have found that rough handling, including breaking of branches, seems to affect the whole plant, not just the part damaged.
I uncovered a very healthy one this spring and did not watch my step breaking a main branch. Even though the others were all a healthy green the rose died back to a stump and took a long time before it started growing again.
If the roots do not like or accept the new location, they will go belly up.
The tap root is vital for long life.
I have been dealing with roses for decades and even the ones that get sickly are over 12 inches high, unless you mean you trimmed them that low.
