It looks like powdery mildew, probably the plants could be too wet or not enough air flow. Take the affected leaves off, you can still eat them just give them a good wash.
White/Gray powdery stuff on Mizuna leafs
Hi all, I am a newbie to the forum and hoping someone can give me some help or guidance. I have some Asian Green Mizuna I got a month and a half ago or so and they have been doing pretty good but I noticed a white powdery substance on one leaf but wasn’t able to deal with it at the time. Now several more leaves have this stuff. Wondering what it might be and how to fix it and stop it from spreading to my other plants. Not sure the pictures do it justice.
