Hollyhock: Rust
Hollyhock: Rust categories: Flowers Hollyhock Hollyhock Diseases Ornamentals revision date: 2024-06-05 02:03 Hollyhock rust symptoms and sporulationPhoto by: R.S. Byther Biology Hollyhock rust is caused by a fungus that overwinters in basal leaves which may live through the winter, or on plant debris. Spores remain viable for at least four months in the soil. Reddish, […]