I was told previously that this yellowing is caused by lack of Nitrogen?

[dakotamoon]

Still learning, and loving - this is my Afghani Kush Plant at 3.5 weeks of flowering, very nice trichomes - but the yellowing started in the center of the plant just after going to 12/12 .. I've been feeding her Earthjuice Bloom, and recently fish fertilizer to try and get some nitrogen to those yellow leaves, I've tried using a foliar spray as well.

As mentioned this is my first grow, is this yellowing normal? I have no idea. Thanks in advance.

 

[MassMedMan]

Got an interesting top cola there, what's up with that?

That's not good 3.5 weeks in. Not normal.
I'm guessing there's root problems going on. That's a swag. But, it's isolated somewhat. What's the medium and can size and type?

Is that bar your light source? Looks close.

Don't panic. But keep your expectations on the lower side.

 

[dakotamoon]

The top cola I was worried that it would grow like crazy and to keep the canopy somewhat level .. I topped it 1 week before veg ended, I won't do that again. The medium is bagged earth with many things added: fungi, enzymes, microryzae.. thingys. and worm tailings. I understand now why people use coco and vermiculite.. no critters, another rookie mistake. The cloth pot is 10 gallons! This is a 3 x 3 tent with a 4"fan and filter system. Is there anything I can add at this stage to make the roots better? Thanks!

 

[dakotamoon]

Should I cut the rest of the yellow away?

 

[nivek]

top cola,, a polysomethinorother,, a thread in here about em somewhere,, some genetic quirk or similar

friend,, science says that in flower,, a cannabis plant requires nearly zero nitrogen to grow optimum,, in fact near no ferts at all, and will grow just fine without any ferts at all

i have a buncha plants like yours right now,,

not from underfeeding,, but from OVERFEEDING

and perhaps a bit of low ph

start there,, worst thing ever would be to add more fert

and ya,, when the yellow is total and complete,, it will never recover,, not a bit..leaf is useless,,and in the way

karma sent friend,, cheers

 

[dakotamoon]

Thanks, I will trim away the yellow and flush the plant and pray.

 

[dakotamoon]

I'm taking a crash course in root rot, so I may try to introduce some more enzymes in plain water to the soil.

 

[nivek]

just a note,, a reminder,, overwatering is even more dangerous than overfeeding,, cheers

 

[dakotamoon]

So I have the dreaded "root rot", I'd feel much better if I knew how it happened and how to prevent it in the future. ??