Is this a mold? #273226 - Ask Extension

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Is this a mold? #273226

Asked August 26, 2015, 6:43 PM EDT

It's white and it feels like powdered sugar. Seems to be growing around a covered garden area, on our brick trim. And, any advice?

Marion County Oregon

Expert Response

Hello,

My apologies, but I cannot positively identify this. It doesn't appear to be mold. Another option could be efflorescence, which is often confused with mold. Efflorescence is an odd phenomenon I don't know much about, but the image matches with other examples of efflorescence. Efflorescence is essentially salt deposits that are whitish in appearance, and occur on masonry, stucco, brick and concrete. 

Best,
Diana
Diana Rohlman Replied August 31, 2015, 9:34 AM EDT

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