It’s Hollyhock rust … it seems almost unavoidable if you grow hollyhocks. I find they can carry on for several years just coping with it, and then that area of the garden will need a rest from them for a few years while you grow them next year.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.