Got some brown spots! What could it be?

Strain; white widow (Bergman)
Soil in pots, Hydroponic, or Coco? Hydroponic
System type? Rdwc
PH of runoff or solution in reservoir? 5.8
What is strength of nutrient mix? EC, or TDS 750ppm
Indoor or Outdoor indoor
Light system, size? 2× 1000w led
Temps; Day, Night 77-73
Humidity; Day, Night 50%
Ventilation system; No
AC, Humidifier, De-humidifier, NA
Co2; EXHALE CO2 bag. But just got it a week ago

did you spill some Nutes by accident, they look like burn marks, are they damaged underneath as well ?

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Agree but looks like maybe sprayed on🤔


Looks like nute burn, maybe, or an early calcium/potassium deficiency. A couple of those tips are burnt. I don’t know much about RWDC though, what a good ppm should be (the plant looks a month or less old?), or how cal-mag should be applied in such a system. Got a pic of the overall plant? Good luck.

Welcome to the forum @420Gomez !


I agree, but I suspect it dribbled ,

drops on under a strong light will burn spots. it’s like a magnifying glass.

I can see the spots shine through but that’s about it. Its only on the older leaves. Don’t think i ever spilled nutes on them. I have 4 plants going. 1 is doing really good. No spots. 2 are doing good but have some spots. 1 kinda stopped growing, still growing roots though

check ur ppm. plan to reduce ur ppm. it looks like nute burn from inside out

I was wondering if i was a little high on ppm. I lower it a bit.

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Most burns are two sources: nute overdose and PH out of balance.

The exhale CO2 bag will be a very good thing…once the first 3 months it takes to get going is over.

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I’ll bet you may have made a feeding just a tad to strong, because they don’t look very bad at all right. just cut back on the nutrients for a couple of feedings say to 50% and see what happends.

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