Try some Miracid. 1 tsp per gallon. Within 2 weeks they should green right up. It sounds like a nitrogen issue. Pics?
killerweed420 Reviewed by killerweed420 on . First grow,outside of all leaves yellow? 8 plants growin indoors,in soil,ph 6.7,250 watt light,fan used,4 weeks into growth.Was bein fed nutrients for 2 weeks each 2 or three days. Just waterin in da last few days? Where to go from here? All help useful. Rating: 5