Nutrient burn or light burn?

What is this? Haven’t had this problem in my other grows.

Did this come through as a picture? Thanks guys?

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)

-What strain, Seed bank, or bag seed (photo or auto)
-Age of plant
-Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
-Vessels: Type and capacity of container (fabric, plastic, etc)
-PH and TDS of Water, Solution, runoff (if Applicable)
-PPM/TDS or EC of nutrient solution if applicable
-Method used to measure PH and TDS
-Indoor or Outdoor if indoor, size of grow space
-Light system List brand and wattage/spectrum
-Actual wattage draw of lights
-Current Light Schedule
-Temps; Day, Night
-Humidity; Day, Night
-Ventilation system; Yes, No, Size
-AC, Humidifier, De-humidifier,
-Co2; Yes, No

If growing Hydro some additional questions:

-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution

Always try to upload a clear picture in white light of any issues you may have to allow the community to assist you.

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Thank you Myfriends410. See my answers next to your questions. Regards Hal

From their page on Amazon:

  • :seedling:【High Efficiency Energy Saving】High PPFD, up to 1965 μmol/m².s, only 450 watt. Adjusting 3 mode, the power will not decrease. The grow light with 2196 SAMSUNG LM281+ LEDs, advanced LED diode SMD LED technology to provide high PAR output, increase light penetration and longer lifetime. Comparable to a traditional 1000W HPS or CMH light. Save up to 60% on your electricity bill.

How big??

When did you calibrate PH pen last? Plants look hungry to me. If you are in anything larger than a 3 X 3 you may need more light, but plenty for veg.

If PH meter is in calibration I’d strongly suggest acquiring a TDS meter to do a runoff test: this will determine if your soil is depleted enough to warrant supplementing. You WILL have to supplement in flower to get to the end game, FYI.

Thank you. I will recalibrate the Ph meter. I have a TDS meter but have not used it. I assume a runoff test is by flushing the plants and collecting the runoff and test. I’ll need to read up on what the information tells me I get on the TDS meter.
My tent is 5x5 and my light puts out 450 watts (not 4500). I have the light 30" from the plants.
Thanks guys for the help.


Forgot to mention I use Fox Farm fertilizers. Big Bloom, Tiger Bloom and Grow Big at 50% as recommended by Fox Farm.


Almost: watering to runoff. You’re looking for about 20% runoff and capture the last 10% or so. This will give you some idea of what’s going on in the soil layer. Take the PH while you’re at it. Remember: distilled water only for this test.


Thank you. I will do the test in the am NY time and report back.



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I think Myfriendis410 has you in pretty good shape here. For the future, light damage will be most prevalent at top of plant and not so much at bottom. Your plants look most damaged at bottom and less moving up.