I recently have been experiencing issues with my potted Pope John Paul showing yellow veining in the leaves which eventually is leading to the leaf fully yellowing and dying off. I removed all of the affected leaves, and the issue persists. I have adjusted the watering, less watering for a few weeks, and more watering for a few weeks - to see if it was a watering issue but with both, the yellow veining has persisted. I initially thought it could be chlorosis but soon discovered after research that it usually presents itself in the opposite, green veins and yellow leaves. As you can see in the pictures, the rose is still producing lots of new growth and buds. She is on her second year now and this issue only recently started a few months ago.
I did a reverse image search on Google using your foliage image. It led me to this article about roses in Houston, TX. It indicates it’s heat and water related. See if this helps address what you’re seeing. Good luck!
How large is that pot? Diameter and height please. Also your rose is surrounded by pavers and other heat reflecting areas. The heat and need for additional water may be contributing to your problem. Maybe transplant it into a much bigger container.
It’s entirely possible that particular pot receives more direct sunlight on the pot or more hot air or reflected and radiated heat than the others. You are aware your air conditioning unit blows HOT air around that plant, literally “air frying” it? Perhaps the others don’t receive as much hot air circulating around them as this one does? Hot air blowing across the foliage literally sucks the moisture out of the plant, often faster than it can take it up via the roots and push it to the growth tips. You might consider moving it farther away from that source of blowing hot air.
