I first saw signs of an issue 5 days ago. The serrated leaf edges started to brown (lower leaves - see pic). There was zero yellowing so I thought it may be that my light was too close. I then moved the light appx 20" away from the plant. Two days later the browning is getting worse and the yellowing is making its way from the bottom leaves to the top leaves with the veins remaining green. Could this be a magnesium deficiency as opposed to iron since it is starting at the bottom of the plant? Or something completely different. Please help. Grow Specs -4 week old plant -600watt LED (appx 20" away from plant) -18/6 Light Cycle -Temp Swing (74-88deg) -Humidity Swing (57 - 71%) -Watering ever 5 days -Had to combat a spider mite problem, seems to have cleared up)
What nutes are you using? And do you pH your water? Can we get a pic of the whole plant as well Sent from my iPhone using Grasscity Forum
