I looked at some examples online and I'm pretty sure it IS PM. There are some plants where it's all over. Should I harvest early on those? I sprayed a water and apple cider vinegar solution on them today but I'm not sure it's going to help much
Looks like a bit of both. Definite ash, but the big splotches look like PM. DO NOT spray with water until getting most of the ash off, as it looks like you have a lot on there. Use a leaf blower or shake em good before spraying. Too mich as mixed with water can create lye and fuck up your plants