Almost 100% of the locally purchased roses this year for me have had some nasty leaves on them. They've been losing all their leaves, leaving only extreme bare canes. I been feeding them extra with Age Old Kelp & trimmed the canes down, and have been rewarded with brand new leaves that look perfect.
However, on these two roses (one's Memorial Day, the other is a Sterling Silver), this is what the leaves originally looked like.
I know it's not blackspot. Is it just extreme dryness?