Nearly to start my new LED grow need help with this kind of defficency

Hi i'm building a new coco setup with 650W LED and 600W hps i'm a 4x8 tent.
I use coco with powder feeding for the feeding.

My light is a dimmable hortibloom 650W 2035 diodes of Samsung lmb301h and Osram 660.

I use to see this kind of defficency behind LED Lights, this is on a Friends grow. I don't want to get in the same trouble.

Maybe Mg issue or maybe to much light? What do u think

Calmag. High power LED can make the plant demand more. Up whatever dose you give. Or your organic go to for vitamins & minerals.


Edit: I'm seeing other things tho.. like clawing and necrosis in the back. Possible N burn (Guessing that because of the clawing) or potassium deficiency. I'd have to get a closer look.

HydroKid239 said:

Calmag. High power LED can make the plant demand more. Up whatever dose you give. Or your organic go to for vitamins & minerals.


Edit: I'm seeing other things tho.. like clawing and necrosis in the back. Possible N burn (Guessing that because of the clawing) or potassium deficiency. I'd have to get a closer look.

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My thought aswell. Looks like nute burn/lock out. Possibly low temps aswell.

Tesla1200 said:

Hi i'm building a new coco setup with 650W LED and 600W hps i'm a 4x8 tent.
I use coco with powder feeding for the feeding.

My light is a dimmable hortibloom 650W 2035 diodes of Samsung lmb301h and Osram 660.

I use to see this kind of defficency behind LED Lights, this is on a Friends grow. I don't want to get in the same trouble.

Maybe Mg issue or maybe to much light? What do u thinkView attachment 4809369

Click to expand...

Maybe Thrips

Rocket Soul said:

My thought aswell. Looks like nute burn/lock out. Possibly low temps aswell.

Click to expand...

Yea I think it's way too much at once for it to be just the LED making the plant demand more... unless she was being underfed??


What say you OP?

HydroKid239 said:

Calmag. High power LED can make the plant demand more. Up whatever dose you give. Or your organic go to for vitamins & minerals.


Edit: I'm seeing other things tho.. like clawing and necrosis in the back. Possible N burn (Guessing that because of the clawing) or potassium deficiency. I'd have to get a closer look.

Click to expand...

The EC it's Right i think that the cal mag defficency is blocking another elements like K.

Rocket Soul said:

My thought aswell. Looks like nute burn/lock out. Possibly low temps aswell.

Click to expand...

Temps 20-26 i bet that si a cal mag loco out

Probably pH related from lack of buffering capability in soil. If you don't run silicate you need to add "Calmag" at about 4th week of flower.

The buffering capability (lime) get used up and washed away with runoff leaving a medium without a pH buffer.

Tesla1200 said:

The EC it's Right i think that the cal mag defficency is blocking another elements like K.

Temps 20-26 i bet that si a cal mag loco out

Click to expand...

A calmag def really wont block any other element afaik, but over feeding calmag is a common reason for K lockout.

Its hard to give an advice on an old photo of your friends grow.

My general advice is :
Instead of running high ec try to increase transpiration by adding heat and controlling vpd. I a high intensity flower situation you need to be around 26-28C. And keep some mag /epson salts for if you start seeing bleachy light colored growth.

Tesla1200 said:

The EC it's Right i think that the cal mag defficency is blocking another elements like K.

Temps 20-26 i bet that si a cal mag loco out

Click to expand...

Its hard to comment on ec being "right" in your photo, it does not look right but also (i assume) this is an old photo and hard to go back to check ec in and ec out.

Thank u Friends is not very clear the issue.

I hope that i don't get in te same trouble as My friend.
I share a foto of My actual grow in the last week of bloom.

Tesla1200 said:

Thank u Friends is not very clear the issue.

I hope that i don't get in te same trouble as My friend.
I share a foto of My actual grow in the last week of bloom.

Click to expand...

I dont think those plants look deficient. For Calmag defs with leds: usually its an issue of transpiration, keep +81F or +25C with around rh 50 and youll probably be fine.

With Coco and leds its a good idea to prebuffer your coco