I have 2 rose bushes in pots that have REALLY suffered this year. I am in an area that has recieved an extensive amount of rain this year. Blackspot is eating them up! This is actually a good picture, now the plant is down to 2 branches all the rest have died. Last year this plant was flourishing with 6" blooms and it was VERY full! Is there anything I can do to save it before it completely dies?