Ask-a-Dave's-Gardener: White dust on leaves, 3 by Iris_Poppy_III

Iris_Poppy_III wrote:
Hello,

I am a beginner gardener. I notice today white specks on the leaves of several plants on my balcony. It\'s on most plants (zucchini, tomatoes, spinach, arugula, basil, book choy).

They wipe off easily.
They seem to be spread evenly.
The plants look otherwise fine.

I think it might be pollen as we have a lot of trees around but I just want to make sure, it\'s nothing bad.

Anyone ever seen something like that?