leaves yellowing at 4 weeks flowering

cadjg

Member
leaves yellowing curling and some twisting at ends at 4 weeks flowering why. using 2 prong ph meter reads are different on most and those with a level of 3.5 are green but the yellow leved ARE AT 6
 
this is my first post and im so new at this just frustrated so forgive me. ive read it could be a magnesium, ph or phosphorus so im not sure what 2 do
 
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