Not 100% sure what is causing this discoloration

So I've looked at the chart everyone passes around and some pics online, can't be 100% sure on my own here.. I have a Colombian Gold girl growing, roughly 2-1/2 weeks into flower, and the new growth contains yellow forming from the inside of the green. I pulled a leaf for a pic. Can't tell if maybe a N or S deficiency, or Mag. Any help would be appreciated and feel free up let me know if you need more info or pics. (She is in FFOF and has been fed FF Grow during Veg and a transition mix of FF Grow and FF Big Bloom once she started flower, with liquid kelp added each time as well)

First pic is a leaf I pulled 2 days ago




Second pic is another leaf right now

My thoughts are leaning towards iron
Iron affects the top growth first. Yellowing between veins as well. Leaves go yellow, veins stay green.
I realise you're in soil. So a tad above ph6 but under ph6.5 is ideal IMHO.
You have been feeding as well. You're in ffof too. I don't think you're deficient.
Have you checked the ph of your soil?
Here's a handy chart.


Where abouts are you, on the chart?
Check iron, on the chart.
I'm leaning towards a ph issue.

Qwertypops said:

So I've looked at the chart everyone passes around and some pics online, can't be 100% sure on my own here.. I have a Colombian Gold girl growing, roughly 2-1/2 weeks into flower, and the new growth contains yellow forming from the inside of the green. I pulled a leaf for a pic. Can't tell if maybe a N or S deficiency, or Mag. Any help would be appreciated and feel free up let me know if you need more info or pics. (She is in FFOF and has been fed FF Grow during Veg and a transition mix of FF Grow and FF Big Bloom once she started flower, with liquid kelp added each time as well)

First pic is a leaf I pulled 2 days ago

View attachment 4122409


Second pic is another leaf right now

View attachment 4122410

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A whole plant pic would be helpful, too.

Not N deficient that I can see.

I agree with Tim, iron is likely. Calcium, magnesium and iron are all related and need to be in balance with one another. pH is definitely a possible cause. If it is too high then iron gets locked out and that can sometimes manifest as magnesium deficiency symtoms, as I understand it.

Rinse your soil with a lot of water, flush it real good, like 3 gallons of water minimum per plant. Do it in the sink or bathtub if you need to.
Let it dry at its normal rate and then resume feeding. I prefer to run my water/solution between 6.5-7.0 in soil, Tim says 6.0-6.5, and reality is anywhere between 6.0-7.0 is fine.
Always check pH of your final solution, or your plain cold tapwater, to make sure you stay in that range.

If you have lockout no amount of adding stuff will help. Rinse and re-do.

Tim1987 said:

Have you checked the pH of your soil? I'm leaning towards a pH issue.

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Thinking about it, my nute schedule is pretty balanced I think as well, so you may be right about this. I haven't checked *soil* pH but I make sure I pH every time I feed/water to 6.3 - 6.4. I'll pick up a soil probe or soil test kit tomorrow to check it out. Thanks a lot brotherman.

Michael Huntherz said:

A whole plant pic would be helpful, too.

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First, I appreciate your proper grammar. Second, I will get a full-plant picture put up here in the morning if you think it will help. Thank you for checking this out.


Edit: posted pics now so I don't have to disturb their dark cycle later

Ph!!!

The worst top




A different top




Full Plant

Qwertypops said:

Thinking about it, my nute schedule is pretty balanced I think as well, so you may be right about this. I haven't checked *soil* PH but I make sure I PH every time I feed/water to 6.3 - 6.4. I'll pick up a soil probe or soil test kit tomorrow to check it out. Thanks a lot brotherman.




First, I appreciate your proper grammar. Second, I will get a full-plant picture put up here in the morning if you think it will help. Thank you for checking this out.

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Thanks for noticing that I make an effort in the grammar department. Writing with clarity is difficult, so I stick to the rules.

Qwertypops said:

The worst top

View attachment 4122438


A different top

View attachment 4122440


Full Plant

View attachment 4122441

Click to expand...

Scratching my head, pH out of whack or potentially root problems are what I would guess.

I have used that soil and those nutes together a few times, and have never seen a problem like that. It looks more like N deficiency than I guessed, but not convinced that’s it. Iron still seems likely to be deficient.

Is it possible to let it dry a bit and pull it out enough to check the roots? Or maybe just transplant to something bigger and give her a flush?

I wish I had a better idea. Good luck!

You don't add things when you grow in FFOF soil. People keep doing this. All you need to do is make sure that the container of soil is large enough to support an entire grow period. That's it, it's all you need to do. To add all that stuff is going to kill the plant.

polishpollack said:

You don't add things when you grow in FFOF soil. People keep doing this. All you need to do is make sure that the container of soil is large enough to support an entire grow period. That's it, it's all you need to do. To add all that stuff is going to kill the plant.

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You, sir, are a broken record. There is, however, a kernel of truth hiding in or near your absolutist proclamtions. I hate to admit you may be right, after a fashion, in this case.

OP; The manufacturers’ recommendations are almost always too much. I don’t follow their feeding schedules at all. If you are, back off to half what they recommend, after a good flush. Your problem may be overfeeding.

Michael Huntherz said:

Scratching my head, pH out of whack or potentially root problems are what I would guess.

I have used that soil and those nutes together a few times, and have never seen a problem like that. It looks more like N deficiency than I guessed, but not convinced that’s it. Iron still seems likely to be deficient.

Is it possible to let it dry a bit and pull it out enough to check the roots? Or maybe just transplant something bigger and give her a flush?

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I am going to check soil pH tomorrow, if it is out of range I will correct it. If it's too crazy I'll flush the heck out of it and start fresh on that. The soil should be dry enough to peel back the pot and see the roots, too.

polishpollack said:

You don't add things when you grow in FFOF soil. People keep doing this. ... To add all that stuff is going to kill the plant.

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I know FFOF can support a grow from seed to harvest. I haven't been using a truly full strength regimen. It doesn't seem to be hurting any of my other girls, but a] they're autos and b] they're different strains. Thank you though, I may just need to dial it back some with this strain as it's a landrace.

Interesting that Huntherz goes from iron, to pH, to scratching his head... all signs that Huntherz has no clue what he's doing. Oh yes, root problems too. Let's not forget that one. What I've noticed over the years is that people will come here with explanations for problems that really can't be proven one way or the other. This forum becomes one big guessing game. This really isn't that hard; it's just growing plants. If you buy a bunch of stuff in the store expecting the best plants ever, you're making a mistake.

polishpollack said:

Interesting that Huntherz goes from iron, to pH, to scratching his head... all signs that Huntherz has no clue what he's doing. Oh yes, root problems too. Let's not forget that one. What I've noticed over the years is that people will come here with explanations for problems that really can't be proven one way or the other. This forum becomes one big guessing game. This really isn't that hard; it's just growing plants. If you buy a bunch of stuff in the store expecting the best plants ever, you're making a mistake.

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1. Not my plants, my plants are healthy.
2. I know more than your whole family tree combined.
3. Blow it out your ass.

I was trying to help the OP, which is hard from a distance. Take your holy war somewhere else.

If you had any idea what you were doing you would know that pH and iron uptake have a relationship. So do root problems and uptake.

Congratulations!

You’re the next contestant on “ignore the idiot troll fucktard”

If you look at the Ph chart above you will see that Iron is the first mineral to show at high Ph.
Calcium and Magnesium are deficiency's that show when the Ph is to low.

Haze the maze said:

If you look at the Ph chart above you will see that Iron is the first mineral to show at high Ph.
Calcium and Magnesium are deficiency's that show when the Ph is to low.

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But that doesn’t necessarily explain or fix his problem, either way.

Easiest path forward is to flush with plain water and/or repot, in my entirely cocksure know-it-all opinion. IMCKIAO lol

Haze the maze said:

If you look at the Ph chart above you will see that Iron is the first mineral to show at high Ph.
Calcium and Magnesium are deficiency's that show when the Ph is to low.

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I agree with Michael!

polishpollack said:

If you buy a bunch of stuff in the store expecting the best plants ever, you're making a mistake.

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See, everybody, something I think we can all agree on.

I guess I agree with pollack in one other way, too.

It is often a guessing game.

I submit it is not useful to have someone yell that at us from nowhere, but it is true.
Again, importantly, not remotely useful.

The trick is to focus on the next actionable step.
I think I have said it at least once already.

Flush and/or repot, monitor the changes, then choose the next step.
Cheers, OP.

My honest opinion, for the way forward.
Tomorrow. If the ph checks out, and is in range, it's almost certainly overfed.
If the ph is high. It's ph lockout.
Being deficient seems extremely unlikely to me. But you can check your ec, by mixing a soil sample with distilled water. You can do ph this way too. Allows you to use your pens.
Just grab the ratios off Google.
Make a decision after determining your ph tomorrow.

Good luck.
Keep us all updated

Tim1987 said:

My honest opinion, for the way forward.
Tomorrow. If the ph checks out, and is in range, it's almost certainly overfed.
If the ph is high. It's ph lockout.
Being deficient seems extremely unlikely to me. But you can check your ec, by mixing a soil sample with distilled water. You can do ph this way too. Allows you to use your pens.
Just grab the ratios off Google.
Make a decision after determining your ph tomorrow.

Good luck.
Keep us all updated

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Go team!