Brown leaves at 3 weeks

[Skinboy]

Hi All

just starting my second grow under LEDs and my Northern Light has got a severe case of brown leaf
I am 3 weeks in and have checked PH at 5.7 and fed once a week
its a full hydro setup that I grew successfully for the first time last year with Blueberry Bliss. Drip fed , air bubbler, and fan.
LEDs are a Mars rig and I have them about 12” above the plants
any help on where I am going wrong would be much appreciated

 

[Chris Scorpio]

Lights seem too close, that age should be about 24" away

How hot is the tent or area

What nutes and what % of manuf suggested are u using, % not the amount please

How do the roots look??

Any enzyme cleaners like hydroguard and z7 in yer system

 

[Skinboy]

Hi Chris, thanks for the quick heads up. I have moved the LEDs to 24” and here are my nutes details :

Using FloraMicro Grow and Bloom in following amount: 25ml per 40 litres of water each which I reckon is 0.06% by volume of each one. Does that sound about right?

the roots are lovely and white and growing deep into water. Not using any cleaners at all

oh and tent inner temp is at a steady 24 deg C.

i think it must be I had the lights too close. Now I have moved them will the leaves recover and the rest of the plant ok?

 

[Chris Scorpio]

What % of manuf suggested amount is that
What do THEY recommend for ml/L

 

[Chris Scorpio]

How often do u change the rezz

 

[Skinboy]

The amounts are bang on the manufacturers guide:
i have a 40 litre of water
They recommend 2.5ml per 4 litres
So times 10 = 25ml

I have not changed the water since starting 3 weeks ago but it has not dropped much so thought that it would be ok

 

[Chris Scorpio]

Never do full nutes in hydro, that why they are burnt up

Cut it in half or more

Also rezz change at least every week if no enzyme cleaners, bet you got goopies in it

 

[Skinboy]

Goopies??

 

[Chris Scorpio]

Gunk and stuffs from the water and nuts globbed up
Goopies....lol