Light Burn? Nute Question

[Niwashi]

Hi All,

About 3 months from seed into my grow, still on the veg cycle getting ready to flip soon. I noticed yesterday that I have some.yellow on the edges of my leaves. I had my 1500w LED grow light 3-4 inches from the plant tops so I'm suspecting light burn. I've backed the light off to 8" or so.

Does this look like light burn or is this a nute issue? I'm running gh grow:micro:bloom is roughly a 31 ratio at 350 ppm. Haven't changed water in several weeks, due to no smell, steady ppm and PH, have only been topping off with water/nute mix in the original ratio. This is because the plant has been doing quite well and I haven't want to screw up a good thing. I will most likely change the res in a few days and start with a fresh batch of nutes for transition.

Open to any suggestions on nutes!

IMG_20180322_201412.jpg

• Niwashi
• Mar 22, 2018

IMG_20180322_201343.jpg

• Niwashi
• Mar 22, 2018

IMG_20180322_201338.jpg

• Niwashi
• Mar 22, 2018

 

[Troy01]

Looks like light burn to me. I toasted a couple leaves myself by having my light cranked up too much and too close and it looked real similar. Another sign of too bright a light is the edges of the leaves turned up.

 

[FelipeBlu]

I agree. Looks like light burn to me too. Raise the light if you have room. If you’re still having issues after running out of room, a piece of window screen (or two) will cut some of the intensity.

 

[Niwashi]

Thanks @Troy01 and @FelipeBlu !!!!