why is it that i grew white dwards in soil under a 250w hps ( using a $30 small fan) and got just over an ounce per plant, then this time around i dun the exact same seed fan etc under a 400w hps and haveonly got a half ounce per plant? frustrating
You're giving way too little information for anyone to offer any useful advice. Pictures of your grow space would be a start. But there are many reasons why you could yield less despite using a larger light.
