Is this a mold?

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

1 Response


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.