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Any ideas what caused this?

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Any ideas what caused this?

Rookiethumb Apr 5, 2022 30 Replies 3,482 Views
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Rookiethumb

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#1

Any ideas why the new growth is yellow? One week into flower. Heat was 60-68 humidity about the same. Fox farm mix half and half. Some fish oil is all I have given them other than I sprayed neem oil 3 weeks ago. Any thoughts or suggestions? I am a rookie so don’t be to hard on me lol
 

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Frankster

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#2
Rookiethumb said:
View attachment 1233048View attachment 1233048View attachment 1233049
Any ideas why the new growth is yellow? One week into flower. Heat was 60-68 humidity about the same. Fox farm mix half and half. Some fish oil is all I have given them other than I sprayed neem oil 3 weeks ago. Any thoughts or suggestions? I am a rookie so don’t be to hard on me lol
Click to expand...
Sulfur deficiency; a very clear cut case of it indeed. Keep these photo's for labeling this deficiency;

I would highly recommend; immediately spraying say 1 tsp Epsom Salts (magnesium sulfate) per quart to pint; but mix well ie. twice daily; then perhaps flush the bottoms well also; cause you could be a bit on acidic side down below; difficult to determine; without checking the runoff pH. You might simply be able to flush down below with Epsom salts also; and fix the defect.. ie. say 1 tsp per gallon of fluids. pH of it should assist autocorrecting any imbalance also.

But I would still perform the foliars to get her back on track the next few days; ie. 3>5 days minimum.



 

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Beowuuulf

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#3
(First two pics) Looks underwatered but i would guess its Over watered .. whats your watering technique and schedule? (Based on the taco leafs looking like heat stress but u posted low Temps)
 
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Frankster

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#4
Also; as it improves; we can move this discussion to ->>>> here; https://www.thcfarmer.com/threads/f...helpline-post-your-problem-child-here.132999/
I will attempt to perform updates on the status of your grow; if you post the updates.
 
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freezeland2

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#5
Temps 60 - 68 and humidity about the same. IMO thats pretty low temp and the humidity a bit high for flowering. But I defer to Frankster.
 
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Rookiethumb

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#6
freezeland2 said:
Temps 60 - 68 and humidity about the same. IMO thats pretty low temp and the humidity a bit high for flowering. But I defer to Frankster.
Click to expand...
As I was told by a gentleman that is mentoring me. I have since increased it to 70-75. New growth is brighter. The one that is most effected is the purp d . The super skunk looks not to be as bad as does the rom. But all have yellow new growth. I tried temps at first, so I am not throwing to many things at it. But it seems the worst one may be a waste to continue but I am a rookie lol
 
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Rookiethumb

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#7
Beowuuulf said:
(First two pics) Looks underwatered but i would guess its Over watered .. whats your watering technique and schedule? (Based on the taco leafs looking like heat stress but u posted low Temps)
Click to expand...
Mostly every 3 rd day. Sometimes every other depending how dry it is.
 
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freezeland2

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#8
Rookiethumb said:
As I was told by a gentleman that is mentoring me. I have since increased it to 70-75. New growth is brighter. The one that is most effected is the purp d . The super skunk looks not to be as bad as does the rom. But all have yellow new growth. I tried temps at first, so I am not throwing to many things at it. But it seems the worst one may be a waste to continue but I am a rookie lol
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The temp should be around 80 and humidity below 60 at this point in the grow.
 
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Frankster

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#9
Rookiethumb said:
As I was told by a gentleman that is mentoring me. I have since increased it to 70-75. New growth is brighter. The one that is most effected is the purp d . The super skunk looks not to be as bad as does the rom. But all have yellow new growth. I tried temps at first, so I am not throwing to many things at it. But it seems the worst one may be a waste to continue but I am a rookie lol
Click to expand...
No doubt temperature is relevant in this equation; so probably more into what's happened here is the low temps are starving the sulfur availability; or uptake... If this makes any sense.


My guess would be resonance ie. In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or ions by the combination of several contributing structures into a resonance hybrid in valence bond theory.



The effect of temperature on the patterning of water molecules located remotely from a single SO42− ion in aqueous nanodrops was investigated for nanodrops containing between 30 and 55 water molecules using instrument temperatures between 135 and 360 K. Magic number clusters with 24, 36 and 39 water molecules persist at all temperatures. Infrared photodissociation spectroscopy between 3000 and 3800 cm−1 was used to measure the appearance of water molecules that have a free O–H stretch at the nanodroplet surface and to infer information about the hydrogen bonding network of water in the nanodroplet. These data suggest that the hydrogen bonding network of water in nanodrops with 45 water molecules is highly ordered at 135 K and gradually becomes more amorphous with increasing temperature. An SO42− dianion clearly affects the hydrogen bonding network of water to at least ∼0.71 nm at 135 K and ∼0.60 nm at 340 K, consistent with an entropic drive for reorientation of water molecules at the surface of warmer nanodrops. These distances represent remote interactions into at least a second solvation shell even with elevated instrumental temperatures. The results herein provide new insight into the extent to which ions can structurally perturb water molecules even at temperatures relevant to Earth's atmosphere, where remote interactions may assist in nucleation and propagation of nascent aerosols.
 
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#10
I also add my water is natural spring from my house that is 6 even for the most part
 
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Rookiethumb

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#11
Frankster said:
No doubt temperature is relevant in this equation; so probably more into what's happened here is the low temps are starving the sulfur availability; or uptake... If this makes any sense.


My guess would be resonance; this is only an educated guess here; perhaps. But certainly a huge contributing factor in the overall system at play here.

View attachment 1233068

The effect of temperature on the patterning of water molecules located remotely from a single SO42− ion in aqueous nanodrops was investigated for nanodrops containing between 30 and 55 water molecules using instrument temperatures between 135 and 360 K. Magic number clusters with 24, 36 and 39 water molecules persist at all temperatures. Infrared photodissociation spectroscopy between 3000 and 3800 cm−1 was used to measure the appearance of water molecules that have a free O–H stretch at the nanodroplet surface and to infer information about the hydrogen bonding network of water in the nanodroplet. These data suggest that the hydrogen bonding network of water in nanodrops with 45 water molecules is highly ordered at 135 K and gradually becomes more amorphous with increasing temperature. An SO42− dianion clearly affects the hydrogen bonding network of water to at least ∼0.71 nm at 135 K and ∼0.60 nm at 340 K, consistent with an entropic drive for reorientation of water molecules at the surface of warmer nanodrops. These distances represent remote interactions into at least a second solvation shell even with elevated instrumental temperatures. The results herein provide new insight into the extent to which ions can structurally perturb water molecules even at temperatures relevant to Earth's atmosphere, where remote interactions may assist in nucleation and propagation of nascent aerosols.
Click to expand...
Can you dumb it down for me a tad. Ha! Thank you sir!
 
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#12
Rookiethumb said:
Can you dumb it down for me a tad. Ha! Thank you sir!
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Yea; just trying to give a general description of the issues at play here; So the temps and your nutrient ratio's do their little dance down there; and it's probably too cold for them to tango; unless they have a bit more sulfur; which contains more bonding affinity; if that makes sense. Especially on the cooler end of it.

it's just a soup after all; so it's got to find an (energy) gradient pathway for assembling itself; or it just keeps making the same errors; then gives up... kaput.
 
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freezeland2

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#13
Rookiethumb said:
Can you dumb it down for me a tad. Ha! Thank you sir!
Click to expand...
Your roots are to cold to uptake nutrients.
 
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#14
Frankster said:
Yea; just trying to give a general description of the issues at play here; So the temps and your nutrient ratio's do their little dance down there; and it's probably too cold for them to tango; unless they have a bit more sulfur; which contains more bonding affinity; if that makes sense. Especially on the cooler end of it.

it's just a soup after all; so it's got to find an (energy) gradient pathway for assembling itself; or it just keeps making the same errors; then gives up... kaput.
Click to expand...
Appreciate your time, all of you! I am gonna get this figured out lol. I will try the Salt spray and report back in a few days.
 
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mysticepipedon

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#15
When there is an immobile nutrient problem, showing up at the growing points, it's often just the pH being off.
 
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#16
mysticepipedon said:
When there is an immobile nutrient problem, showing up at the growing points, it's often just the pH being off.
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I would agree normally but his temps are down in the 60’s. Them roots are cold and she ain’t feeding because of it. My guess anyway…..
 
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Moe.Red

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#17
Frankster said:
Also; as it improves; we can move this discussion to ->>>> here; https://www.thcfarmer.com/threads/f...helpline-post-your-problem-child-here.132999/
I will attempt to perform updates on the status of your grow; if you post the updates.
View attachment 1233066
Click to expand...
You are doing gods work sir. Where’s the tip jar?
 
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Frankster

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#18
mysticepipedon said:
When there is an immobile nutrient problem, showing up at the growing points, it's often just the pH being off.
Click to expand...
I think that's the most common parameter yes; but it collapses on all sides.... What usually happens IMO; is when times are good; people max out the nutes; then the environmental drift; and it gets stuck with too much load....


insta failure; and not the kind that's easily fixed; it's got to be "rebooted" chemically speaking; or a reset of sorts. It certainly can be diluted; then buffer dialed in also; there's always more than one way to do something like this...


Unexperienced growers tend to shoot high in the zone; trying to score some extra points; at least this was the case for me. You've got to shoot 'THOUGH" the target to score better; not higher.... Faster; and less arcs.... You want something holding you to that center spot bubba. ie. a laser.

When you shoot an arrow with a laser; then you can figure in drift; and cross wind a little better; generally speaking; and give the target from much longer distances. w/accuracy. Then have one in the string again; as it's hitting the target.... Then your shooting arrow guns... precision types. darts... darts.. darts.. and consistency. Not a giant wad of shit heaving in all at once.

I've got a system for doing this; but it's a process of sorts. Cause each element is it's own dial; and the environmental are the wildcards; unless you got them locked in rock solid w/controls. Most individual do not have anywhere near this level of homeostasis; or "enhanced" equilibrium. Get what I'm suggesting here; it's all of it. Only one pillar has to bend for the entire system to crash....

Stated another way; Other factors "support" what is weak; to keep from collapse. It's like pulling out sticks; from a strong stick building; on the bottom sides.
ie. a house of cards.


 
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Rookiethumb

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#19
Yes!!! So many variables. Sure anyone can grow a weed. But it’s every little thing you mention to get that top shelf. Some guys have success with little or no research or work. Some try and fail. Some are happy with growing it just to grow it. Some want to make it the bestest. That’s the beauty of it. Do what makes you happy! Each grow is different and everyone has their own way. I never knew so many people are growing and doing really well with it. Amazing times!
 
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Rookiethumb

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#20
So I ended up trashing 2 of my plants, the purple d and the midnight mass just seemed to cooked. The super skunk seems to be doing ok. The Rom is still a little yellow and not sure how it’s gonna turn out. My buddy said the bud structure is trash. He brought me a clone of Berry Payton and 501 to replace the ones that I screwed up with. But he also brought me some spider mites so now I am gonna learn how to combat them quickly. I did the salt spray and turned my lights down some as they were a tad hot. It did help get rid of most of the yellow but the buds were burnt looking and scraggly. These flowers are two weeks in. He says they don’t look good at all. Opinion?
 

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Replies 30
Views 3,482
Started Apr 5, 2022
Latest post Apr 29, 2022
Starter Rookiethumb
Forum Advanced Techniques & Problems

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