New to soil, late flower, what am I looking at

[Tolerance Break]

Howdy! I'm looking at some Mango C5 haze that will likely come down towards the end of July. I'm not really planning on doing anything to fix it, as the damage is done, and the plant is almost finished, but I'd like to get an idea of what happened in order to avoid it.

Lots of variables here:
Lights are GLS 300s
Flipped the first of April (close estimate)
PPFD (using Lux meter w/ .016 multiplier) just over 900 at the top of the cannopy for most of flower.
Soil is BAS take and bake in 27 gal totes converted to SIPs with roughly 3 inches of resovoire. I should do the math, but I haven't yet, that's my bad.
The tote is covered in panda film with holes for the plants.
I added a bunch of old weed leaves and stems with Bokashi Bloom from BAS to get the microbiology running, and I believe I had some Nit Tox early.
For water, I used dehumidifier water with EM1 every few weeks.

That's about it. Here's the plant in question. This is the most illustrative of the plants, they all have varying degrees of this issue, but this is the worst of them. There are a few photos with lights on, and a few with the lights off. Oh, and the plant foxtailed at the top, which is why there's so many white hairs up top. The lower half of the plants are where I got my estimated harvest window.

Any help would be greatly appreciated. This is my first time growing anything in soil, and Im pretty happy so far.

 

[Hugo Phurst]

Looks a bit hungry & foxtailing all over the place.

 

[Tolerance Break]

Looks a bit hungry & foxtailing all over the place.

Yeah, sounds about right.

 

[Budzbuddha]

Fine looking flowers BTW

 

[Tolerance Break]

Fine looking flowers BTW

Thanks man, really happy with the outcome (so far) all things considered.

 

[Budzbuddha]

My 2¢ -

Looks like they are craving more feed ( PK also ) - leaves are being cannibalized.

 

[twistedgardener43]

Yeah, just hungry but really perrty buds!

 

[curious2garden]

Fine looking flowers BTW

They are gorgeous!

 

[GanjaGreg.]

look at those buds!!
Curious why do yall say they look hungry?

my first guess was over fertilization considering the damage seems to be starting at the tips of the fan leaves working in.

 

[Budzbuddha]

look at those buds!!
Curious why do yall say they look hungry?

my first guess was over fertilization considering the damage seems to be starting at the tips of the fan leaves working in.

Because K deficiency mimics nute burn. Even the tips.

He is in deep flower - plants are obviously wanting more feed. Look at the dominate flower growth … it takes alot to push all of that . Deep flower feeding often increases.


Symptoms of potassium deficiency:
The tips of the plants turn yellow and this spreads towards the center, ending at the base of the leaf.
Leaves will look like a nute burn.

 

[natureboygrower]

look at those buds!!
Curious why do yall say they look hungry?

my first guess was over fertilization considering the damage seems to be starting at the tips of the fan leaves working in.

That's what I was thinking as well when i saw em-1 in the equation.

@Tolerance Break ime with em-1, if your soil is enriched enough with nutes , em-1 might not be necessary and might cause some lock out issues or over fertilization. Ime with my water only soil and em1 was that I did not need it, and when i used the em1 it was almost as though it was causing a boost of nutes all at once to my plants ( I'm in SIPS, this could also be a reason) it didn't cause immediate lock out or over fert, the plants just looked unhappy. With the 2-3 different grows I watered with em1, it usually started with the first application so I just stopped and they'd bounce right back.

 

[Budzbuddha]

EM-1 conditions the soil and microbiology within not bloom.

96% water ( on label ) and some molasses.

Much better and cheaper solutions for microbial amendments - Dynomyco / Xtreme / etc.

Plants want a Bloom specific feed.

 

[natureboygrower]

I'm going off my results with em 1 and SIPS. I only used it a handful of times, but it caused issues every time.
I'm also going off of the N toxicity earlier in the grow and size of @Tolerance Break planters. 27 gallons of soil should last enough for 2 plants let alone 1. It's BAS so im assuming it's good quality
I'm in about 10 gallons of coots soil and rarely run into nute problems with 1 plant.

 

[MissinThe90’sStrains]

I think you just ran out of available food. Even though sativas aren’t usually heavy feeders (at least not nitrogen) is still takes food and energy to produce all that bud mass, and these plant have been in flower twice as long as most typical plants. My logic - plants had all their food laid out for them since the beginning in a built soil. No food has been added since. Plants have been flowering aggressively. Plants were looking healthy throughout grow, when food was maxed out. Plants are now looking hungry and/or showing issues. Logic to me seems to say it’s probably not burn. I’d feed them, or start with bigger containers for such long flowering plants next time. Fucking huge buds dude!

 

[Tolerance Break]

Thank you @natureboygrower, @Budzbuddha, @twistedgardener43, and @MissinThe90’sStrains for the sound advice, and some more thanks to everyone who left kind words. I will give them a little something to get to the end of flower, and hold back on the em1.

This soil stuff is pretty cool! Reguardless of how this turns out, I can't wait to do it all over again come fall/winter.

 

[Budzbuddha]

Thank you @natureboygrower, @Budzbuddha, @twistedgardener43, and @MissinThe90’sStrains for the sound advice, and some more thanks to everyone who left kind words. I will give them a little something to get to the end of flower, and hold back on the em1.

This soil stuff is pretty cool! Reguardless of how this turns out, I can't wait to do it all over again come fall/winter.

Bro it’s correctable , let’s get those beautiful ladies to the finish line. Those spear shaped buds are epic.
Run them til the wheels fall off !