WSU CAHNRS and WSU Extension

Hortsense

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Problem
(factsheet)
Plant NameTypeDescription 
RustHollyhockDiseaseHollyhock 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, raised spots develop on leaf undersides, and then darken late in the growing season. Stems may also be attacked, and if the case is severe, leaves may dry up and hang down.