Leaf turning yellow?

Hey guys , I got a problem with my baby's the bottom leaf r turning yellow I don't know why? Their only 2 weeks 4 days 4' tall growing in soil , please any ideas why? My PH looks like is running 6.9-7.0 my 600watts MHL r 2.6" above my plants I put water plus foxfarm nuts as they need it please guys I need help!!! ;(

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I second that

scroglodyte said:

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I third that, Here Here! No pics no info

One thing that can turn the leafies from green to yellow is excess phosphorous. A lack of nitrogen can do that too, as the nitrogen is what generated chlory...chloryly... the stuff that makes the leafies green, lmao

Thank u rollup Rick !!