Ask-a-Dave's-Gardener: What is on my 4 o’clock leaves?, 2 by firefly1399

firefly1399 wrote:
I am growing 4 o’clocks from seeds as I do every summer. I noticed that some of the leaves have white marks on them. I’ve never had a problem like this with them. I tried to do some Googling but haven’t been able to find anything. Does anyone know what these marks might be?

As some background info, I saved these seeds from last year’s 4 o’clocks. I grew those ones from seeds that I purchased.

Thank you!