Is this white powdery mildew

[Kestrelgrows]

Have had these white splotches that don't wipe away for about a week now, they haven't gotten any bigger but seem to very slowly spread to other leaves. In the pictures the splotches look yellow but they are definitely white.

 

[BigChief612]

That looks more like a bug problem. Check the undersides of your plants leaves, looks like spider mite damage to me.

 

[BurnzYzBudZz]

Please take the time to watch all 16 minutes. I just finished it and came across your thread. Scope for mites.
Watch “Cannabis Diseases & Pests: Kill Hemp Russet Mite Broad Mites on Cannabis” on Vimeo:

the video takes about all kinds of mites. You look to have spider mite damage as stated above. I sincerely hope not..

 

[Kestrelgrows]

Appears to be mites