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Q.what causes rust spots on hollyhocks

wilberdo added on April 30, 2012 | Answered

What causes rust spots on hollyhock?

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Nikki
Certified GKH Gardening Expert
Answered on May 1, 2012

This is called rust and is caused by a fungus. The following article should be of some help: https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm

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