spots on leaves? rust color

couple days back someone posted that they were having this problem with rust color spots i too have had this problem twice 1st time tried to nute it out but gave up b/c it was late in flowering almost done and now i early veg wn i had the prob n flower after i harvested i noticed they were root bound this time i transplanted and they took like champs alls well in red dragonville try transplanting if your situation fits

I would like to know too. One of my plants seems to have the same spots on a few leaves.

magnesium deficency and/or ph problem / salt build up.. what nutes you using?

btw welcome weed enthusiast