Only one pic is hard but I would guess toxic salt build up not a deficiency. Gronnh20 N-P-K is complete fertilizer for short cycle resin producing plants.

The trick is to give the plant the correct amount of nutrients at the proper stage in the cycle. His plant is to old for 1/2 strength nutrients, he is in the veg cycle not seedling. If you are only using 1/2 strength then you are shorting your plants a lot.
Zandor Reviewed by Zandor on . i need some help with my plant i need serious help with my month and a half old. it has started these brown spots on third node leaves. i need to know if it something serious i need to worry about. i havent added any ferts. i tested my soil last night with some aquarium test strips . it said that my soil has hard water and that it has a very high nitrate level. if you need more info please ask . help me if you can Rating: 5