Tips of leaves turning brown and dieing

[Khronickush]

I'm pretty sure this is a pk diffency but I have been giving them a lot of pk so I don't know why they are burning like this any info would help thank you

 

[Dumme]

Start by taking pictures without the HPS lights on, as white light is better. Need more info

 

[Khronickush]

Start by taking pictures without the HPS lights on, as white light is better. Need more info

Temp is around 88 burning 1100 ppm of co2 using advanced nutrients just stopped using overdrive and started using koolbloom since i think I have a pk problem sunshine mix #4
Ph 6.3
Rh around 42% these are in the 3rd and 6 weeks in flower

 

[Lucky Luke]

Damn, that 3rd pic is nasty..do as Dumme said..he knows his stuff and may be able to help.

 

[TacoMac]

I'm pretty sure this is a pk diffency but I have been giving them a lot of pk so I don't know why they are burning like this any info would help thank you

You realize that mix #4 has virtually NO phosphorous, don't you? Now Google up some images of Phosphorous deficiency. You'll find it looks exactly like what you have.

How long have you been hitting it with the Koolbloom?

 

[Khronickush]

You realize that mix #4 has virtually NO phosphorous, don't you? Now Google up some images of Phosphorous deficiency. You'll find it looks exactly like what you have.

How long have you been hitting it with the Koolbloom?

I just started with koolbloom last Wednesday

 

[TacoMac]

I just started with koolbloom last Wednesday

That explains it then.

I think what happened is your plants went into flower and had no phosphorous to draw from to begin with, or very little. By the time you notice it, the damage is done.

You're on the right path now though. That Koolbloom has a good bit in it and should bring it around. You need to forget the leaves that are already damaged. They're never going to get better. They're done. Just keep an eye on your new growth. If they are looking fine, then you're on your way to recovery.

As soon as you get some new leaves growing, trim those damage leaves off. They'll just be sucking up energy better used by the new growth by that point.

 

[Khronickush]

That explains it then.

I think what happened is your plants went into flower and had no phosphorous to draw from to begin with, or very little. By the time you notice it, the damage is done.

You're on the right path now though. That Koolbloom has a good bit in it and should bring it around. You need to forget the leaves that are already damaged. They're never going to get better. They're done. Just keep an eye on your new growth. If they are looking fine, then you're on your way to recovery.

As soon as you get some new leaves growing, trim those damage leaves off. They'll just be sucking up energy better used by the new growth by that point.[/QUOTE

Thank you I appreciate it!! I've been using koolbloom everywatering since I purchased it. Should I continue to until I flush for harvest?

 

[TacoMac]

Yes. Use it through the flowering stage just like you did the nitrogen heavy fertilizer through the veg stage. Follow the same rules too and don't use too much too often or you'll burn them.

 

[HighestHD1200]

Could this also cause black tips on the yellow leaves?