leaves not looking good

hello everyone im growing using 70% coco and 30% perlite I'm using im feeding every day with and ec of 1.2 im using 250w hps light temps are staying between 25 and 26.4 degrees when lights on but all my leafs have gone yellow with brown spots and crispy on the edges and tips ive been using 2.5ml of calmag because at first I believed it was deficiency please help

Have you tested the pH of your plants?

Topekomsi420 said:

Have you tested the pH of your plants?

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I've been PH at 6.2

Here ....

COCO FOR CANNABIS

lambokid said:

I've been PH at 6.2

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Roots have good airflow? No rot or mold or anything? Also, I had a similar problem in the beginning, I was using the nute schedule as according to the instructions that came with my nutrients, and it was causing nutrient burn. I ended up having to cut the nutrients down to a quarter of what the instructions were telling me to give in order to fix it, now they’re all doing great.
And make sure your ph meter is calibrated properly, some of them things are super inaccurate. I had one that was telling me my ph was 6.4, I decided to calibrate it again, and it was really 5.8.... I couldn’t figure out for weeks why my plants looked so sickly. If it gets below 6 or above 6.8 (I think) there are certain nutes that won’t be absorbed.

Is it top or bottom leaves or all?? They could be getting light burn or they could have some kind of pest infestation too.

Topekomsi420 said:

Is it top or bottom leaves or all?? They could be getting light burn or they could have some kind of pest infestation too.

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I've checked for pest and does look all clear and a mixture of top and bottom leaves light is about 12inches away as well well confused

lambokid said:

I've checked for pest and does look all clear and a mixture of top and bottom leaves light is about 12inches away as well well confused

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Yea, it can be a nightmare trying to figure it out. I’d suggest try cutting the nutes in half and maybe raise the ph a tiny bit just in case. Also good airflow is important as well as letting your soil dry out before re watering. Since it’s a mixture of all the leaves, its probably not a light or heat issue. There’s gotta be something blocking out your nutes, kinda looks like it could be phosphorus deficiency. Are the stems changing color at all?

Topekomsi420 said:

Yea, it can be a nightmare trying to figure it out. I’d suggest try cutting the nutes in half and maybe raise the ph a tiny bit just in case. Also good airflow is important as well as letting your soil dry out before re watering. Since it’s a mixture of all the leaves, its probably not a light or heat issue. There’s gotta be something blocking out your nutes, kinda looks like it could be phosphorus deficiency. Are the stems changing color at all?

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I wouldn't say so stems always been like a redish colour but I'm using purple punch seeds so I think it's normal for that strain

lambokid said:

I wouldn't say so stems always been like a redish colour but I'm using purple punch seeds so I think it's normal for that strain

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Well, in most cases, if it’s not lighting issues, pests, or mold, it’s gotta be a nutrient lockout which can be caused by so many different things. Or it could be nute burn. Try flushing and then starting over with half the nutes. Also, you could always try repotting them. What type of pots are you using? I use fabric pots and when I water and/or nute them I pour it straight into the tray that they’re sitting in to allow the plant to just soak up what it needs so I don’t risk over watering, and I usually leave the tray dry for a day in between waterings (it’s super easy to over water.)
If I were you tho, I’d just flush no matter what, and I’d repot.. won’t hurt and could fix the lockout.

Topekomsi420 said:

Well, in most cases, if it’s not lighting issues, pests, or mold, it’s gotta be a nutrient lockout which can be caused by so many different things. Or it could be nute burn. Try flushing and then starting over with half the nutes. Also, you could always try repotting them. What type of pots are you using? I use fabric pots and when I water and/or nute them I pour it straight into the tray that they’re sitting in to allow the plant to just soak up what it needs so I don’t risk over watering, and I usually leave the tray dry for a day in between waterings (it’s super easy to over water.)
If I were you tho, I’d just flush no matter what, and I’d repot.. won’t hurt and could fix the lockout.

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I also using fabric pots

lambokid said:

I also using fabric pots

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thanks for your help

How close is your light to your plants?

lambokid said:

thanks for your help

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Np, hopefully you can get to the bottom of it, good luck.

Here’s a couple articles that might help:

lambokid said:

I also using fabric pots

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What is the EC of your runoff?

Rurumo said:

How close is your light to your plants?

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I think he said 12inches, usually with lighting issues the leafs will curl up too and it will only be on top.... so I would think the lights are probably fine.

Rurumo said:

How close is your light to your plants?

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12 to 14 inches

PJ Diaz said:

What is the EC of your runoff?

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0.3 more then what I'm putting in