So idk if this belongs here but perhaps some people on here have some knowledge on roses…
I have some 30 (or so) year old rose bushes of a few different varieties at my house. They are monsters. But they definitely have something going on with them.
They have some sort of infection that spreads between all of them. It is a white residue on the leaves that resembles hard water staining almost. They are so mature/established that they still produce great but it is something I have been meaning to ask.