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Pest & Diseases > Sick plants
I moved my Hollyhocks to a part of my garden where they would get more water on a regular basis. They have so far done well and are bigger and fuller then they ever were. But, about two weeks ago I noticed something appeared to be nesting on the underside of the leaves. There were hundreds on each leave- about the size of a pinhead and rust in color. They do not appear to be any of the typical Hollyhock diseases. I cut off each infested leave and threw it in the garbage. The interesting part is I have tons of other perennials in the same area and none of them are affected- just my hollyhocks. There are other plants in between my hollyhocks and they are fine- whatever it is simply liked the hollyhocks. Any ideas? Thanks!
By the sounds of things, your place of residence being "NorthWest' must mean USA - e.g. summer while we are in winter here in Australia. However it sounds (and looks) very much like 'Rust" being a sort of fungal disease which is quite common, but can be quite selective on which plants it chooses to affect. Sulphur spray is effective but harsh. We have a good Eco solution in Australia called 'Eco-Fungicide' - available here in the shop:- https://www.gardensonline.com.au/Shopping/GardenShop/Show_6417.aspx There will be local alternatives available in your corner of the USA.
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