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Yellow spots on biggest plant’s leaf

  • Thread starter Thread starter BlueberryNewbie
  • Start date Start date Feb 18, 2022
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Yellow spots on biggest plant’s leaf

BlueberryNewbie Feb 18, 2022 4 Replies 1,354 Views
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BlueberryNewbie

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#1
Hello
I bought a lighter lamp and almost immediately these spots came out on the biggest leaf I left on the main stem, I don't know what they could be, light stress, nutrient excess, or lack of nutrients (I was thinking about calcium being the first time I use ro water and calmag)... what’s your opinion?
 

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Newber

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#2
I always start with this chart
 

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Homesteader

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#3
I would definitely get it some calcium. A handful of gypsum would fix it imo although I'm not quite sure if you already have calmag or not and or used it. If you have it, use some.
 
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mysticepipedon

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#4
Give it some cal/mag.

When I switched to LEDs, my lower leaves would burn like that. It seems to me to be related to a need for more magnesium, but it could be calcium.
 
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BlueberryNewbie

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#5
I put cal mag but being the first time for me using it I checked the sheet indications and add 1 ml for 2 liters, I’m gonna use 2 ml.
Thanks!
 
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Replies 4
Views 1,354
Started Feb 18, 2022
Latest post Feb 18, 2022
Starter BlueberryNewbie
Forum Cannabis Infirmary

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