amsterdam flame pics sick for not

I keep this amsterdam flame in veg for 4 months is was a mother i flushed and put it in to flowering about 5 weeks ago, its looking ok but not as healthy as i would like, at the beginning of the flowering i trimmed off most of the fan leaves to promote new bud growth it worked in a sense but the plant leaves are yellow and curling up. Anybody is welcome to comment and help is appreciated. soil mix, hps 600,
 

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