Last year, I had a failing plant die. My other one isn't doing well this year either, and I've given it some special attention withfertilizer, leaf mulch, alfalfa pellets, extra water even tho we haven't hit the hot dry weater yet. I was just looking at it, and realized it's doing the same thing it's been doing for years, and I don't want to loose this one too.

The leaves, starting with the largest have a brownish/rust colored spotting starting. Does Rhubarb get rust like some other plants? Suggestions?

Thanks
Karen