Brown spots on leaves

ive been noticing some brown spots on the fan leaves and they have been spreading slowly..shes a kush plant ive been giving her nutesfor 2 weeks now..viagro 24-8-16...ive only been giving her about 1/2 strength every other feeding.....please help

any advice appreciated.. bump

are you just feeding it base nutrients ? n-p-k only ? You need "trace minerals" (boron, zinc, magnese etc..) then later on you'll need carbs / sugars .

ic3blink said:

are you just feeding it base nutrients ? n-p-k only ? You need "trace minerals" (boron, zinc, magnese etc..) then later on you'll need carbs / sugars .

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yea the nutes im using isnt just n-p-k it has trace minerals