Maybe a silly question about chlorosis
I have a problem with chorosis in my rose bed - 4 large unknown roses in the bed. I don't know the variety as they were all here when I bought this lot. If I add some Ironite will the leaves that are showing yellow turn back green again? One of them suffers much more than the rest - has long canes and deep red very fragrant blooms. Last year our extremely cold winter killed them all to the ground but they came back like gangbusters with all kinds of new canes and are blooming like crazy now. I'm in zone 7b - New Mexico if that makes a difference. Because of our dry climate I have deep mulch filled wells around all 4 plants to conserve moisture. Maybe too much information.