I've left the stems and the entire rose unpruned this year. You can probably see it's not exactly thriving so I've just broken off the old flower buds and let it settle in without heavy pruning because the year previous I'd moved it to this more sunny position. Funnily enough both solid coloured flowers are offshoot stems from the main stem that still threw out the variegated flower. So they are not from under the graft but above it. This happened in late summer so well see in about 6 months.
The mix has split, mutated for those two stems. The flowers perfectly reflect the variegated flowers.
A guy near us has roses and they are amazing. He's cut them right back now and it looks like he has bags of fertilizer & mulch all around the bases. Looks like a bag and a half per plant.
I've been lucky enough that the soil is really good here. Most of my roses and fruit trees are thriving because the old guy here used to use pruning compost, chicken manure and charcoal in the soil. I also have a hedge I trim twice a year and just throw the leaves on top and let them rot in over time. When I bought this one I didn't know much about roses and unfortunately I got one where the stem under the graft is very thin so I think that's the reason why it has struggled along with the relocation. It's budded up nicely now though through winter and is starting to shoot at the same time as the more established ones where last year it was lagging behind, so I think it's on the improve.
Depends on how you pruned it, did you leave any shoots on the stems that threw those flowers.