Need formula for Hollyhock disease
Hi, Well to be honest, hollyhocks are very prone to this problem and it's almost not worth the trouble to be doing all that spraying. Ultimately, they will still bloom, but if you consider the fact that hollyhocks are biennial, then to me, you can let them be since new plants will develop each year. Those old plants die off. However, it will help to clear away all the old plants and diseased foliage at the end of the season.
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