Actually my Apricot Vigorosa came from Northland Rosarium also. I moved it this year and did not recover very well so I've ordered it this year from Palatine In case I lose it over winter. I do have 3 Pomponella that are ten years old from Palatine that grow 6-7ft. and a good 6 feet across. Here they have no cane left in spring and grow up from the ground to their sizes. I had to remove one of the pomponellas due to a rose disease that I had never seen before. When dug the graft was gone and it had grown on its own roots.
The plan for Apricot Vigorosa was to root a cutting if successful, then remove the multiflora rose. I have a feeling after emailing Carol that the own root AV didn't do well there either. So don't anyone jump to get AV just because it did well for me. But it has been wonderful for a good long time.