been growing roses for 50 years but have a new problem.
About 3 out of 12 have developed white edges on the leaves which eventually turn completely white then brown then die. One or two stems at a time
One bush looks like it's already gone.
I uncovered them about a month ago and all looked healthy.
Have applied Bayer rose and flower care.
only thing i can think of is fertilizer burn, but why not all of them. The Bayer is pretty low in nutrients and i have used it for a long time without any problems.
will post pics if necessary