Nitrogen deficiency?

[Dav7]

Hey everyone
I have few autoflowers 20 days old in 5gal fabric pot with organic soil.

Temperature, 29 degre celius
RH 66%

Spider farmer se7000 - 22 inch distance to the canopy

PH water to 6.2-6.4
Water every other day (never run off)

At day 15, gave some Biobizz nutrients.
2ml/L BioGrow, 2ml/L Bioheaven/Earth, 2ml/L Alg-A-Mic, and 1ml/L CalMag

Then I gave water only at day 17.

And nutrients again at day 19 as I could see 1/2 yellow leaves on few plants.

What could be the deficiency as you can see on the pics? (Pic took at day 19)
Nitrogen?

 

[Trichome farmer]

Hey everyone
I have few autoflowers 20 days old in 5gal fabric pot with organic soil.

Temperature, 29 degre celius
RH 66%

Spider farmer se7000 - 22 inch distance to the canopy

PH water to 6.2-6.4
Water every other day (never run off)

At day 15, gave some Biobizz nutrients.
2ml/L BioGrow, 2ml/L Bioheaven/Earth, 2ml/L Alg-A-Mic, and 1ml/L CalMag

Then I gave water only at day 17.

And nutrients again at day 19 as I could see 1/2 yellow leaves on few plants.

What could be the deficiency as you can see on the pics? (Pic took at day 19)
Nitrogen?

the ph sounds a touch low to me for soil growing id like to be between 6.5-7.5ph

 

[Dav7]

the ph sounds a touch low to me for soil growing id like to be between 6.5-7.5ph

Wow, really, up to 7.5 seems to be high but interesting to know what works for u

 

[MotaZona]

Watering every other day is excessive, yet your soil is cracking as if it’s dry…weird.

 

[Dav7]

Watering every other day is excessive, yet your soil is cracking as if it’s dry…weird.

I water 600/700ml in this 5 gal fabric pot... I think it's not much. No runoff
My se7000 is 22 inch distance, 65%power... 29 degre celsus, maybe that's why my soil is craking

 

[MotaZona]

I water 600/700ml in this 5 gal fabric pot... I think it's not much. No runoff
My se7000 is 22 inch distance, 65%power... 29 degre celsus, maybe that's why my soil is craking

Is your soil absorbing the water quickly or is the water flowing into the cracks? I’m not saying it’s causing the yellowing, but it should be corrected. I always top with a quality compost. It helps keep the surface open - YMMV.

 

[MotaZona]

I water 600/700ml in this 5 gal fabric pot... I think it's not much. No runoff
My se7000 is 22 inch distance, 65%power... 29 degre celsus, maybe that's why my soil is craking

These are 24 days old. They’re in 7G bags & have been watered twice. I mist the surface 2-times per day. They’ve been topped.

 

[Dav7]

Is your soil absorbing the water quickly or is the water flowing into the cracks? I’m not saying it’s causing the yellowing, but it should be corrected. I always top with a quality compost. It helps keep the surface open - YMMV.

Yes, the soil absorb the water quickly, it doesn't flow into the cracks only. Thanks for the tip to keep the surface open. I gonna mist the surface.

 

[Dav7]

These are 24 days old. They’re in 7G bags & have been watered twice. I mist the surface 2-times per day. They’ve been topped.

Healthy plants!
How many galons/liters when u water them?
What's your room temperature?

 

[Lil Dab]

Your soil looks way too dry and soil looks like it has gone hydrophobic…. Sounds like you are under watering and that will cause dry pockets in the soil..what brand soil are you using? most store bought organic soils don’t need any fertilizer for the first month at least and some longer.. I keep my water going in between ph 6.2 - 6.8