Yellow leaves in week 4 flower

[Jake6632]

So my plants in day 25 of flower just started week 4 so I’ve just started to add pk I think it could have been pk def but not sure how I will be able to tell only had one water with pk added so maybe that, I then thought nitrogen def or overwatering but I don’t think it’s over watering since the leaves have turned yellow and I’ve also checked the plant for root rot and I don’t think it’s that either. I’ve double checked and triple checked the PH levels and I’ve got the ph levels at bang on 6.2 so I can’t see how nitrogen def can be a problem. Defiantly not any type of light burn and my room drops down to 21/22 on the night which is perfect and my humidity levels are between 35% and 50% during this flowering phase. So I really can’t put my finger on this. It’s the only plant with this problem and I’ve checked for pests in soil and leaves.
Hope someone can help me sus out what the issue is as you guys always do.
Thanks guys

 

[Jake6632]

They look more yellow in person it’s just the light and tbh they look worse than what they are in the photos too? Also is this curable? Or has the plant taken too much damage to bring it arround? Cheers guys

 

[Jake6632]

Anyone got anything for me??

 

[Jjgrow420]

That's some major over feeding and ph issues.
The plant won't recover much it's pretty burnt

 

[PopAndSonGrows]

What medium? If it's just one plant, i dunno man still seems like a pH swing or a severe P K burn

 

[lakesidegrower]

Taking a quick look, it seems like you may be over feeding or there is a lock out happening

 

[Johiem]

I'd lean toward a lockout. Try to leach out some of what you put in and reset.

 

[hotrodharley]

Just give plain water and hope for the best. Overfed.

 

[Southerner]

Too much nutrient

 

[Jake6632]

I defiantly overwatered this plant one night but the other plants took the feed perfect just the one that didn’t and I defoliate the night before also so would you say it’s not recoverable? Or could I perform a miricale on this one

 

[jondamon]

I defiantly overwatered this plant one night but the other plants took the feed perfect just the one that didn’t and I defoliate the night before also so would you say it’s not recoverable? Or could I perform a miricale on this one

If you defoliated your plant why would you feed it straight after?

You’ve effectively cut off the very thing it grows to use the nutrients you supply. Lol.

Fuck that’s so dumb.

like everyone else has said. NUTE BURN pH issues causing uptake issues.

 

[Funkentelechy]

I defiantly overwatered this plant one night but the other plants took the feed perfect just the one that didn’t and I defoliate the night before also so would you say it’s not recoverable? Or could I perform a miricale on this one

That's not what over watering looks like if that helps. As others have said it looks like nute burn.

 

[lakesidegrower]

If I were you, I’d take them outside or in the bathtub and flush the soil with distilled/r.o./ or at the least water pHd to 6.5-7 and run that through each pot a few times to try to get rid of built up excess nutes/salts. I’d give them just plain pHd water for the rest of the run and see what I can salvage.

 

[rmax]

By the time you rescue these, if you even can, the plants will be out of phase and will not perform. It sucks-ass but you should consider scraping this crop and getting started on the next crop right away. Don't waste the time fixing severe nute burn.

In the other column you did get far into the project before a spoiler. Good work!

 

[Jake6632]

I don’t see it can be mute burn when I’ve fed all the other the same and defoliated all the others at the same time. I’ve just had a look at the plants more closely and I’ve realised a early infestation of thrips. Could it be a combined thing of defoliation thrips and nutrient burn?

 

[Jake6632]

It Dosent look recoverable I’m going to scrap but the others on the same side look very good still. What’s the best way of getting rid of thrips in flower??

ive just brought some neem oil but not sure if I can spray on the buds and I’ve brought some thrips predators but there Guna take a few days to come.
I can’t take the plant outside because it’s in a scrog

 

[lakesidegrower]

Be careful with neem in flower - you don’t want to spray the buds - anything you spray em with now will be in the smoke later. Neem is awesome when it’s used as an IPM spray in veg, I use it often. I also use neem meal in my soil mix as a further deterrent. I don’t have direct experience with thrips, but others could probably chime in

 

[Jake6632]

Be careful with neem in flower - you don’t want to spray the buds - anything you spray em with now will be in the smoke later. Neem is awesome when it’s used as an IPM spray in veg, I use it often. I also use neem meal in my soil mix as a further deterrent. I don’t have direct experience with thrips, but others could probably chime in

Thanks for the reply mate.

 

[Jake6632]

By the time you rescue these, if you even can, the plants will be out of phase and will not perform. It sucks-ass but you should consider scraping this crop and getting started on the next crop right away. Don't waste the time fixing severe nute burn.

In the other column you did get far into the project before a spoiler. Good work!

I’m guna trash this but the others next to it are defiantly savable. Any advice on killing thrips?
And can thrips stunt bud development and thc?

 

[Jake6632]

That's not what over watering looks like if that helps. As others have said it looks like nute burn.

I think it’s a combinated of the decimation and pk introduction.