Hollyhock rust and weevils
My hollyhocks are suffering from two problems, which I have been treating separately, but they still aren't looking better.
1. Hollyhock rust: the leaves have the classic pustules on the bottom of the leaves. First only one plant was affected. I took off the bad leaves, and sprayed with neem oil. Soon more leaves became infected and so I cut the plant down. Now a couple more plants are showing signs, so I again took off the affected leaves and this time sprayed with copper. The plants are spaced quite a ways apart, we don't have a lot of rainfall, and I water with a soaker hose. These plants are 3 years old and this is the first year I've had rust. I have a huge row of them and I don't want to lose every plant. I read about cornmeal and milk treatments, but not really sure how to apply them or if they'd be effective at this point. One other change this year is I put compost down and weed blocking fabric and grass mulch on top. I'm not sure if that could contribute to rust. There seems to be some debate on poor vs rich soil causing rust.
2. weevils: this is the second year for these frisky buggers. Last year I tried to control them with D.E. and neem oil. This year the leaf damage seems more extensive. I am doing the same treatment. Last year I was worried I might lose all of them, I found weevils in many of the seed pods. However, the plants came back and were big and healthy until the weevil population exploded again and now I have rust spreading.
Any help would be appreciated. I usually like organic solutions, but at this point, I do anything to save my plants. I can post pictures if that'd help.