Hollyhock rust

[sunloving]

Hello all, I love hollyhocks but every year they look terrible with the rust. I strip and burn infected leaves but was wondering if anyone has actually successfully reversed rust once they have it. My seedlings also have rust and so I'm wondering if it's better to chuck them. Is it copper sulphate that is recommended? Does this actually work?  Hope someone has had success , x sunloving

[sunloving]

[ed dibbles]

My first thought is to use a systemic fungicide to give on going protection or drastically reduce infection.

However reading the RHS hollyhock rust page they suggest bi-weekly sprays which sounds both drastic and costly.

https://www.rhs.org.uk/advice/profile?PID=564