Natural purpling/fade or deficiency? F28 (week 4)

[NateGrows]

Firstly, apologies because I asked a similar question a week ago - but that was old fan leaves under the canopy.

My back two plants have always grown a little faster and (since I can remember) have been several shades lighter green than the plants in front.

But... Now they're starting to purple, and there's a huge fading to yellow going on throughout the canopy. It can't be senescence as they're only just week four and they clearly have a fair while left to go.

Oddly, my sugar leafs on those two plants all look very healthy in comparison to the larger growth. I've attached some pics and a pic of the canopy to give reference of how yellow-looking the plants are compared to the plants in front of them; there's a really significant difference, they're looking more yellow than green now.

What could this possibly be? CalMag def? Potassium def? Some type of lockout, or maybe just genetics/phenotypic? I'm so damn confused. Maybe I'm just being a plant hypochondriac (lol), I just don't want to ruin my largest two ladies. :(

Info:
Strain: Cherry Oreoz - Reverse Genetics.
Using Autopots with Green Planets Dual Fuel lineup:
- CalMag 1.25ML/L,
- Silica 0.3ML/L
- Dual Fuel 1 & 2 0.8ML/L,
- PK Spike 0.8ML/L,
- Vitathrive 0.8ML/L,
- Rezin 0.8ML/L.
pH: always start at roughly ~5.8 in root zone, let it climb to ~6.0 before readjusting. Can't imagine it could be a pH issue as they get a nice variance that's always in range.
EC: Roughly 1.1.
Lights: LED's with IR/UV. ~41DLI. They grew into them for a few days before I readjusted yesterday, so possibly a little light bleaching but as I said; they've always been much lighter green.

Thank you.

-Nate

 

[Redneckx]

Definitely a deficiency.
Could be overwatering, wrong ph or not enough or too much nutes(red stems), Calmag issues(yellow leaves) but if your adding it already then it's probably sth. else.
Check the pH & ec and let others here know, can't help further.
You will rock it, it's not the world end

 

[NateGrows]

Definitely a deficiency.
Could be overwatering, wrong ph or not enough or too much nutes(red stems), Calmag issues(yellow leaves) but if your adding it already then it's probably sth. else.
Check the pH & ec and let others here know, can't help further.
You will rock it, it's not the world end

They've always had mostly red/purple stems since seedlings. Autopots are always on, not really wanting to let them have any dry-back as they're in Coco and have lots of oxygen supplemented (not too much).

pH at root zone is roughly 5.8, I let it drift to 6-6.1 before readjusting.

CalMag always supplemented.

EC is roughly 1.1, probably a little lower than usual at this point but autopots have nutrients available 24/7 so they don't like as much with them. Any more than 1.1 EC and nute burn progresses. Don't dare go any lower due to their colour lol.

Thank you though Redneck, seen you a few times helping me (and others) on here mate. You're a good en

 

[JohnBlazr]

I’d start to lower the mag and silica, add more nutes. She looks hungry.

 

[NateGrows]

I’d start to lower the mag and silica, add more nutes. She looks hungry.

Thanks for your time mate. Will wait for (hopefully) more advice but that may be the way to go.

 

[JohnBlazr]

looks like you’re in soil? I’d cut the cal-mag and give her a heavy feeding.

 

[NateGrows]

looks like you’re in soil? I’d cut the cal-mag and give her a heavy feeding.

In Coco

 

[JohnBlazr]

look at mine that did the same thing.

 

[JohnBlazr]

Cut cal mag , fed heavy , then this :

 

[JohnBlazr]

A coco pro should chime in , good luck man , is the coco buffered or prepared? I know that’s the first thing coco dudes are gonna ask.

 

[NateGrows]

A coco pro should chime in , good luck man , is the coco buffered or prepared? I know that’s the first thing coco dudes are gonna ask.

Hopefully so!

And Coco is pre-buffered premium. Always supplemented 1.25ml/l from seedling - now.

Thank you for trying John matey, I appreciate your time! Hope your grows do amazing

 

[JohnBlazr]

Lastly, I was able to get these issues fixed and the babies that had it , turned out to be the most fire in that batch, so don’t stress homie.

 

[NateGrows]

Lastly, I was able to get these issues fixed and the babies that had it , turned out to be the most fire in that batch, so don’t stress homie.

 

[Redneckx]

They've always had mostly red/purple stems since seedlings. Autopots are always on, not really wanting to let them have any dry-back as they're in Coco and have lots of oxygen supplemented (not too much).

pH at root zone is roughly 5.8, I let it drift to 6-6.1 before readjusting.

CalMag always supplemented.

EC is roughly 1.1, probably a little lower than usual at this point but autopots have nutrients available 24/7 so they don't like as much with them. Any more than 1.1 EC and nute burn progresses. Don't dare go any lower due to their colour lol.

Thank you though Redneck, seen you a few times helping me (and others) on here mate. You're a good en

It's a pleasure bud!
Always trying to help with my little knowledge lol. My first run is done, mistakes helps much! Read like mad. This Forum is the best lecture imo.

View attachment 2095723
Cut cal mag , fed heavy , then this :

He's maybe not wrong. This looks incredible!!
Too much calmag can cause in issues as well, doesn't depend on the soil.

 

[NateGrows]

https://ibb.co/album/mNLy73 <-- 33 pic IBB album/dump

Sorry if not allowed

 

[NateGrows]

Just an update for anyone interested (and people who potentially run into the same symptoms in the future)...

I believe I may have the beginnings of root rot . Would explain some of my symptoms.

Not sure if these are stained due to the Coco, or, yeah... The ol' rot.

Unfortunately, as I'm in a country that doesn't have Hydroguard etc available and can't really add beneficial bacterial due to potential issues with clogging the autopot lines... Not sure what I'm going to do.

Guess I'll have to have a trip to the ol' hydro store tomorrow and talk to the experts & maybe call the official Autopot folks in my country to have a chat about it. Wish me luck.

 

[JohnBlazr]

Good luck man.

 

[NateGrows]

Just an update (again, for anyone runs into a similar problem running Autopots in the future).

Figured it was either root rot or pH lockout as I've never flushed them and ran with nute burn for so long. Could still be root rot, though I don't think so; some of the darkness in my previous picture could have been from additives (Rezin, specifically) as it's incredibly dark and known to stain roots - still lots of healthy roots around.

I spent 11.5 hours flushing all of the pots between today and yesterday, just got finished. It takes roughly 1.5 hours of flushing per pot believe it or not, to get the EC of run-off to come with .1 of input (wash out all the salts this far into a grow) - which I imagine is why people tell you not to flush them, lol.

Pushed the EC up to 1.2 (still a little low, but just seeing how they respond).

Will update in a few days, seeing how the plants react. Last ditch effort to save the two plants as they were getting progressively worse (and the problem seemed to be starting to occur on my two healthy plants). Hopefully we're flying from here, fingers crossed.

If I were to run autopots again, I would flush just as I transitioned to flower. I've heard some people do this and it helps prevent issues (I've read that US Autopot suggest this, though I'm not sure if that's bogus). Added some extra Coco during the flush so the roots have more space to grow now as I'm sure they're root bound also.

 

[Justlovetogrow]

I’ve seen a few people get this problem in auto pots they veg great but get to wet of feet in flower at first glance I thought u may have cut the veg nutes out a bit early and they were sucking the nitrogen out of the lower leafs then I realised it was happening across the whole plant but the dreaded rot will give u the same problem hope ya get em to the end mate cause they look like nice buds

 

[NateGrows]

I’ve seen a few people get this problem in auto pots they veg great but get to wet of feet in flower at first glance I thought u may have cut the veg nutes out a bit early and they were sucking the nitrogen out of the lower leafs then I realised it was happening across the whole plant but the dreaded rot will give u the same problem hope ya get em to the end mate cause they look like nice buds

Yeah. Started in Jiffy Pellets > solo cups, then to the autopots. Veg was incredible, plants absolutely loved it.

If you'd have said this a week ago, I would have said I agree/won't be using autopots again... However, my plants reacted really, really well to the flush. I've since bumped the EC up to 2 to see how they react, but even at 1.2 - the next day, they'd already got some of their green back into them...

Coming to the conclusion that autopots are great, but they really need to be dialled in.. they save a tonne of time but require a few trial and errors to actually understand the nuances of them/get them running optimally.

Couldn't have been veg nutes being cut as my nutrint programme doesn't cut them funnily enough. I think the issue was most definitely feeding them slightly too hot for a good while, eventually causing tonnes of salt build up and then nute lockout.

Thanks for the compliments of my babies though . Got a couple purple-bud phenos in there, I'm hoping they start to really fatten up now I've (hopefully) fixed all the issues. :)