Almost half of leaf turned yellow, anyone encounter this?

Please help, is anyone familiar with this. I know that pic is bad but if someone could help i would be very thankful.

What's it planted in and what have you been feeding it?

Well its been in 6l pots for several weeks and I only water her when soil is dry .

Pojtek said:

Well its been in 6l pots for several weeks and I only water her when soil is dry .

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I mean what is the soil made of? What are the nutrient levels of the soil?

You in coco or soil?
Looks hungry.
What water you using? Ph and ec?

Its organic soil. Ph of soil is between 6 and 7.2 . It says its good for flowers. Im not sure if anything is added to it

Eh yes i tried to use ph meter but i broke it somehow, im watering with tap water.

I also have few smaller plants planted in same soil and they are all watered with same water but they do not show any sign of disease or leaf discolor

Just a guess...too much light.

ComfortCreator said:

Just a guess...too much light.

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I use 200w led but its about 30cm from plant top. Also room temperature is from 28 to 30 celsius and 60% - 70% RH

Pojtek said:

I use 200w led but its about 30cm from plant top. Also room temperature is from 28 to 30 celsius and 60% - 70% RH

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What brand LED 30cm would be too close for some, I can't get mine closer 18" in flower 24 in veg.

RANGERTHEDOG said:

What brand LED 30cm would be too close for some, I can't get mine closer 18" in flower 24 in veg.

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It is not growing light, I bought led reflector because thats all I can afford but its not hot at all. I will move it further just in case.

pH.... you'll need to learn to manage this if you're going to grow successfully. Once you do, your plant will thank you. Good luck.

CannaCountry said:

pH.... you'll need to learn to manage this if you're going to grow successfully. Once you do, your plant will thank you. Good luck.

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Thanks bro!