This one is not for begginers! Looking for the experienced!!!

Sometimes it’s hard to pinpoint the exact cause because issues like this can be caused by several components out of place...

Seraphine said:

I think dialing back his nutrients to just the basics, adding epsom salt and keeping the pH to 5.8-6.0would correct it. The original poster didn’t indicate what the pH had been, unless I missed that bit of info.

@Aquaman would you agree?

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100%

Seraphine said:

Sometimes it’s hard to pinpoint the exact cause because issues like this can be caused by several components out of place...

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Yeah mine is all speculation... like you and I both said to much goin on there

Seraphine said:

Sometimes it’s hard to pinpoint the exact cause because issues like this can be caused by several components out of place...

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Yeah, I like to keep my nutrients simple for that very reason. It almost seems like less is more.

I'd go in to my insane theory about nutrients, marketing, and psychology. But I dont want to blow this thread up.

Sorry was busy let me jump in. So first off No this is not All new growth. In fact only the new growth on one top of about ten on one plant and on one of about six on another plant. And that's it. All other growth is phenomenal. Let me take a few more pics of just the growth.

Ok now healthy

You see so a total of 4 tops out of about 60 or so. And one really effected.

Looks like the affected tops are either the tallest or in the center. More light on them. Faster degradation if having issues.

All these comments and not a mention of nutrient mix ec or runoff ec?

Looks like the bad tops are burning now. Expected. Im guessing the medium has bad salt build up at this point.

First post @Migrower you said you had nutrients dialed and then said you were switching to jacks 321. Which is it and why?

MIMedGrower said:

Looks like the affected tops are either the tallest or in the center. More light on them. Faster degradation if having issues.

All these comments and not a mention of nutrient mix ec or runoff ec?

Looks like the bad tops are burning now. Expected. Im guessing the medium has bad salt build up at this point.

First post @Migrower you said you had nutrients dialed and then said you were switching to jacks 321. Which is it and why?

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Yeah could be overall deficiency, don't feel it's a nutrient buildup at all... Doesn't fit the bill to me so I didn't think to ask. But again good to get the full information before a diagnosis.

I do have this line up dialed in I believe. I've just grown and don't want to pay for bottled/watered down nutes. And I can control exactly the amount of elements I'm adding. And I do have a pretty good build up of salts on my fabric, I've yet to do a complete flush. I was doing fine using a feed,feed,50%feed, schedule. Maybe it's time for a total flush.

It's just all the others are so happy. Maybe a bit green from N but overall I was happy.

Could well be a nutrient buildup then... I would take @MIMedGrower advice and check this.

Aqua Man said:

Yeah could be overall deficiency, don't feel it's a nutrient buildup at all... Doesn't fit the bill to me so I didn't think to ask. But again good to get the full information before a diagnosis.

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The unaffected leaves are very dark green and going shiny. Typical overfeeding symptom.

Some plants need very little nutrients. When most say use 50% of directions i say try 15%-25% first and work up slowly. I also think additives are mostly unnecessary and tend to block roots with excess sugars and PK. And cal mag is almost never called for except if using a complete nute.

Migrower said:

It's just all the others are so happy. Maybe a bit green from N but overall I was happy.

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What you just said “maybe a bit green” is the warning sign. Then yellow tips usually.

Aqua Man said:

Yeah could be overall deficiency, don't feel it's a nutrient buildup at all... Doesn't fit the bill to me so I didn't think to ask. But again good to get the full information before a diagnosis.

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Just my opinion. I posted a bit more about it.

MIMedGrower said:

Just my opinion. I posted a bit more about it.

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Yep I don't disagree with what you have said one bit

Aqua Man said:

Yep I don't disagree with what you have said one bit

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I do the best I can. :-)

Whatever the issue PH is one of them.

SkunkyDunk said:

Whatever the issue PH is one of them.

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Sure. If underfed it is likely high and if overfed likely low. But when ec is corrected the buffer in the medium will pull things back to normal.

I was trying to find some supporting documentation of why I feel it's high P. I don't doubt they were over fed at some point.

Phosphorus excess
A phosphorus excess affects the plant by causing a massive nutrient lockout of other elements like calcium, copper, iron, magnesium and zinc, being zinc the first micro-element to get blocked. In this way, we must check for deficiencies of other elements to correctly diagnose a phosphorus excess and to know how severe it actually is.

If we detect an excess of this element we should flush the roots with at least three times of water than the capacity of the pot. There are products to break down salts to ease the flushing of the roots, which should be always used with an adjusted pH level depending on the life stage of the plant.

Zink and iron are immobile. Also notice the tip scorching in new growth