Well, it sounds like everything you did, you did correctly. I was asking about the spraying (when you did it), because that can cause a burn on the leaves. However, it was not done during the day, so I doubt that was it, even though I am still wondering.... I also doubt that you have "poisoned" the potting mix you have your plants in.
I have been through about a 100 pictures to see if I could ID what is going on and came up with nothing, including if the type of iron you used might have caused this.
Sharifa can be a beautiful rose, however, she is not the greatest growing rose for those of us in hotter weather. I live where it gets hotter than Hades in the summer (actually late spring and early fall can be included in on that statement as well). During the summer, I don't push my roses to bloom at all. I don't feed them. I watch for mites and any other bugs that may come and infest them. I would just leave Sharifa alone for the time being. She really resents the summer time and tends to look awful in the process. Just water her as you do the rest of your plants (you might want to make sure that saucer looking thing on the bottom is not causing the roots to not drain well). I would give her some TLC out of the worst of the sun during the day and see if she improves.
I too love this rose. Against my better judgement, I purchased her a second time (had to shovel prune her the first time due to a very persistent Dr. Huey). She is on trial. While her flowers are gorgeous, she does not like my growing conditions all that much. I find the similar looking Mary Magdalene to do much better for me than Sharifa.
I hope Sharifa improves for you. When she is good, she is very, very good but when conditions are bad.....
