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Q.I have rust on the leaves, stems and buds of hollyhocks. The “garden guru” on a local news show talked of watering the ground with

Zone My Holly springs pa | pofhope7 added on July 28, 2019 | Answered

some treatment. I would rather treat that way than spray the entire plant.

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Certified GKH Gardening Expert
Answered on July 29, 2019

There are many ways to go about this. Sprays will ensure that you kill the spores, which is how it spreads. Ground soaks can kill what is in the ground, but will not touch what is in, and on the plant unless there is something fto let the plants take it up. This can be an oil (coconut has several fats and oils that help plants take up nutrients and chemicals) or synthetic chemicals.

While there are many treatments, such as a ground application of DOLOMITIC LIME and WETTABLE SULFUR (This combo is wonderful, and what I use personally) or fungicides that contain copper (This should be a last resort thing) it may also be necessary to kill the spores of the visible "rust" on the leaves.

This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

This article will give you information on the care of Hollyhocks: https://www.gardeningknowhow.com/ornamental/flowers/hollyhock/tips-on-hollyhocks-growing-hollyhocks-successfully.htm

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