New grow. Brown/ yellow spots on some bigger leaves

Hey, first time posting. Here's a new grow about 4 weeks in. 4 purple alien og around 1 sour diesel. All grown with foxfarm soil/nutes following schedule. All in smartpots as I've found I like them a lot.

Can someone tell me why these spots are appearing on my some of my bigger sour diesel leaves? Thx in advance for any help.

Seems like a Potassium deficiency

What is the npk ratio on your fert?

You may need more K, a 20-20-20 fert would be good

I'm using ocean forest as my soil

i'd transplant it

I transplanted the sour diesel into a nice big pot and am thinking it will fix the problem. Also gave it some cal-mag and a heavier dose of nutes. Will post some pics as grow continues. Lookin good!

Hey all. Heres an update on the sour d/ alien og. First is of sour d looking much better in big pot. second 2 are alien og.



Can't wait to cut