Bleached leaf edges, spotting to some leaves

  • Thread starter mrsgreenfingers89
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mrsgreenfingers89

mrsgreenfingers89

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I am guessing some sort of nitrogen toxicity. I recently underfed these babies, and they just didn’t grow, I had a feeling I was overwatering but soon came to realize it was the lack of watering/nutrients that was causing my issues. The plants then started to grow vigorously and have now come across this issue in 4 of the plants.

Any help to this new grower would be much appreciated 🙏💚

  • Room Size – 8ft x 5ff​
  • Lights – 1x 600w LED & 1X 300W LED​
  • Strain – Runtz Muffin​
  • Growing Medium – Coco​
  • Nutrients – Canna Coco
  • RH – 55%​
  • Temperature – 22c​
  • Extraction - 8 inch CarboAir​

I have been feeding everyday for the past week with the following –

5 litre mix
A – 10ml
B – 10ml
Rhizo – 10ml
Cannazym – 5ml
Calmag – 2ml

The water is then PH’ed to 5.6
 
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mysticepipedon

mysticepipedon

3,332
263
First my disclaimer: I don't know shit about coco.

Are these under LEDs? If so, try turning them down a little bit or raising the light a bit. It isn't intuitive, but it seems that lower leaves can get burned under LEDs, when the plant takes some nutrient from them to feed upper leaves and you get a burn pattern like the one in the last pic.
 
mrsgreenfingers89

mrsgreenfingers89

4
3
First my disclaimer: I don't know shit about coco.

Are these under LEDs? If so, try turning them down a little bit or raising the light a bit. It isn't intuitive, but it seems that lower leaves can get burned under LEDs, when the plant takes some nutrient from them to feed upper leaves and you get a burn pattern like the one in the last pic.
Thanks for your reply, yes they are under LED's I have now moved them to around 28inches above the top of the plants and lowered the power to 50%.

Would you say it is more likely to be light burn than nitrogen? I noticed one plant with claw like leaves, I will attach a photo when next visiting them.
 
Ponky

Ponky

3,149
263
I use peat. When that happens to me it's a smidgen too much fertilizer.
 

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