'Mme Plantier' was the first OGR I planted, a band from Heirloom maybe twenty-five years ago. Planted in fill dirt on a steep slope and irrigated only enough to get through the first year or two, she eventually spread more than 15' wide and looked wonderful with no care except an annual shearing of spent blooms. And she smothered an expanse of unruly bank.
Recently I had a dreadful two-year siege of rose rosette disease. Despite being the biggest shrub in the garden and surrounded closely by neighbors who fell sick in sequence, she withstood it almost to the end. But last summer I found aberrant growth in two different sections of Mme P and faced the daunting task of bagging many bushels of plant material and getting rid of a massive root system in a place that was too steep for me to stand up on.
As I took the plant down, I found that, in addition to the original one, there were four satellite crowns that had been formed by tip-layering or suckering, and at least two were supporting infected growth. I decided to kill the stumps and roots with Roundup, and the larger crowns needed repeat applications. I planned not to replant until 2015, lest infected growth should come up from the roots.
Well, last weekend I was digging out honeysuckle and other mess in the area, and lo!, here was the old madam apparently making a comeback somehow, with four healthy 2' stems coming from a single crown, and no stumps there. But it is not far from the original crown. I'm sure this growth wasn't there last summer, because I inspected the area weekly for a couple of months. It came up this spring despite drought conditions on the bank. There is no sign of herbicide damage or RRD. How do you think this happened? I guess there was a small secondary crown that was independent enough to avoid infection and inconspicuous enough that I didn't poison any remnant stubs.