I live on the eastern end of Long Island and we have been inundated with rain this year. So much so that the blackspot on my roses is vicious. It’s everywhere! All of my climbing tea roses are covered with it, finding a leaf without it is a rarity. I have been spraying with fungicide, neem oil & sulphur rotationally between the rains but it continues to get worse.
Here’s my question: should I just continue to spray through the summer and give them a hearty prune next spring or should I prune them down to the nubs now?