Quote Originally Posted by BobBong
I've also understood that a P overdose can look alot like a K def.. what do you think?
I think that the P overdose actually causes K def by 'locking it out' and making it unavailable to the plant. You will also see scorched leaf tips if you are creating overfert lockout conditions. In a pH lockout condition, these may not be present.
stinkyattic Reviewed by stinkyattic on . rust on leaves? on my little ones still in veg. theres a substance appearing on the leaves that looks like rust has this ever happened to anyone:wtf: Rating: 5