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White stuff on crepe myrtle

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posted 4 days ago

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I'm sure it's some sort of fungus but it seems to be growing on a few of our potted crepe myrtles. Can anybody tell me what it is and suggest a fix for this?

Thanks much!

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Anne Miller

steward

Posts: 18547

Location: USDA Zone 8a

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posted 4 days ago

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Can you post a picture of the white stuff?

My guess without seeing it is that it is powdery mildew and a fungicide will take care of that.

Here are several nontoxic fungicide recipes:

https://permies.com/t/93537/nontoxic-Fungicide

Invasive plants are Earth's way of insisting we notice her medicines. Stephen Herrod Buhner
Everyone learns what works by learning what doesn't work. Stephen Herrod Buhner

Christopher Weeks

master gardener

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Location: Carlton County, Minnesota, USA: 3b; Dfb; sandy loam; in the woods

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I want to emphasize that I live somewhere very different than you do by noting that I have 18" of snow outside right now, so there's plenty of room for me to not know your plants and pests. But it looks like powdery mildew to me too.