italianx, if you're bottom leaves are turning yellow you probably need to give a little fertilizer. This is different from leaf tips turning brown after fertilizing, which probably means the grower has given too much fert. On your fan, you put a fan in there to exchange air, bring in CO2, control temps, and to knock plants around a little, make them wiggle. The wiggling will cause the stems to strengthen so they will stand up straight as they grow. Otherwise, they will fall over.
polishpollack Reviewed by polishpollack on . Yellowing leafs These two bagseeds were planted on the 26th.I have a 115w CFL 2100k (wrong spectrum, i know) and a 20w 5xxxk to balence it out a bit.I have 2pc fans obe for intake one for blowing the plants.SHOULD IT BLOW DIRECT ON THE PLANTS. I gave the a light dose of nutes yesterday,but i useualy dont start untill the 2nd week. ANY HELP!!!!! Rating: 5