This is a very common disease of hollyhock. Remove or bury plant residues at the end of the season. Control weeds in the mallow family, which are also hosts for this pathogen. Although the foliage becomes unattractive, hollyhocks usually flower well despite this disease. Refer to the appropriate Virginia Cooperative Extension Pest Management Guide (link on navigational bar on left) for information on fungicides.
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Disclaimer: Commercial products are listed for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products that may also be suitable. Due to continually changing laws and regulations, Virginia Cooperative Extension can assume no liability for the suggested use of chemicals contained herein. Always consult the pesticide label, which is the law, and follow label directions and precautions.
