What to do: Severe yellowing, brown leaves, four weeks into 12/12

Below is a group shot of my closet grow, the leaves are almost all yellow now, with leaves turning brown:



They are four weeks into 12/12, in 2.5l pots, with garden soil amended with perlite, diatomaceous earth, vermiculite and azomite (all I could get at the time). I'm using DynaGrow with Protekt. PH is 7 from the tap. When I first noticed the yellowing a few days ago, I used some 5-1-1 fish emulsion, but they just got worse. I will try flushing them later today, maybe it will help?

WOW. I have never seen that kind of height on a plant like that. Not complaining or saying its wrong, just was surprised is all. I always lst them plus topping. Anyways, I think its not as bad as you think it is. After 4-6 weeks you start to get yellowing on the bigger fan leaves, or I always have anyways. I woul d maybe cut back on the nitrogen if your that far into budding. Other opinions are of course welcome.

Yea they look nice, never seen a plant that was just staight up growth and almost no branching. I am at week 4/5 of flower and a lot of sun leaves have yellowed and died. It is a nitrogen deficiency, which is normal when the plant switches to flower it uses up the stored energy in the sun leaves, as long as the new growth/bud sites don't showany dedeficiencies I wouldn't take any drastic action.

What kind of light you usin and at what distance? Shits way streached..you might want to concider some bigger pots b4 flower and some top/lsting, anyway feed that fucker

My journal (for what it's worth) is here: https://www.rollitup.org/grow-journals/718721-cannabis-loves-2012-ghetto-closet.html

I vegged them under a 600w MH then switched to HPS about one week into flower. They did stretch a bit, they are about 4 ft tall. There is side branching, but this picture isn't very good, I'll post better ones tonight when the lights go on.

Light is about 14 inches from the tops.

It's normal for your fan leaves to turn yellow and die sometime in flower.
Your plants look decent, I wouldn't worry about the Fan leaves yellowing this late in Flower.

Good Luck on Your Grow.