Help! Whats wrong with my plants?

[the.underachiever]

I really don't know what happened...one of the plants in my garden has leaves with brownish spots, and I don't know what is causing it. I think I might have over fertilized, but I'm not sure. The leaves develop brown spots, and then turn yellow and die. I grow in soil, and my tap ph is 7. I don't ph my water. All the plants in my garden seem to be ok, except this one.
Any help would be great...
Thanks in advance.

 

[the.underachiever]

Anybody? Are these symptoms of nutrient lockout?

 

[maknbongsbubble]

Anybody? Are these symptoms of nutrient lockout?

It looks like nute probs to me but for the guys on here than know more than I they will need more info! watering times nutes and how strong are they are you in veg or flower post a pick of the whole plant too but to me it looks like a lockout(N) deficincy

 

[AK91]

Try Flushing you plan and picking up jorge cerventas horitculture marijuna bible it awnser all your problems