Nute Burn or P def?

Hi Friends,

Looking for a little help. Over the last week or so, I'm seeing some leaf issues on the top 1/3 of my plant. I've started using liquid nutes this run, vs dry nute teas and I can't figure out what's going on.

Strain: C99xSweetTooth#3
Medium: Organic soil (1/3 Pro-Mix HP, 1/3 Humus, 1/3 Perlite) + Nute mix of Kelp meal, alfalfa meal, crab shell meal, dry fertilizer, N guano, P guano. Lime and Glacial Rock Dust
Lights: 240w LEDs
Temps: 66-81F
Ph: Always 6.5-6.7

Plants are at Day 32 of flowering.

I've had this strain dialed in during precious runs, so I'm thinking its the change in nutes.

I'm using Maxicrop Liquid Fish(5-1-1), Maxicrop Liquid Seaweed (0-0-1) and Roots HP Guano (0-4-0), plus Pro-teKt Silica.

Instead of nutes every 3rd watering, I tried low nutes at every watering this time. I won't be doing that again.

Any help would be greatly appreciated. If you need more info, please ask.

Bump for a lil' help.

So, I don't feel it is Nute Burn. I foliar fed yesterday with diluted Maxicrop Liquid Seaweed and Epsom Salt and there has been some slight improvement on leaf colouration.

Any opinions are greatly appreciated

I don't know so I would hit her with an AACT and let her decide what she needs.

dont think its nute burn either because it mostly just yellow burns the tips of your plant then works its way inward/outward whatever you will. your leaves are changing colors but not sure whats causing it

Thank you for the responses.

What I'm having a hard time figuring out is why it is only affecting the top leaves - particularly those directly under the light. It is certainly a deficiency of some sort, but I don't know what it is.

I have foliar fed them again this evening and will use an AACT tomorrow.

I'll keep you posted

Bugeye, I see your go to move to sort out any problems is to use an AACT. It is mine as well.
I watered with AACT last week when I first saw the problem. Why it is continuing is what is so confusing.

jackAmo said:

Bugeye, I see your go to move to sort out any problems is to use an AACT. It is mine as well.
I watered with AACT last week when I first saw the problem. Why it is continuing is what is so confusing.

Click to expand...

Well, I think you have to go back to what is different. Are you feeding more ppms per week with the constant feed or about the same as the every 3rd water?

Is this a clone of stuff you grew last time or could it be a different phenotype?

I think you'll have muy bueno weed in any event. Lots of green still left to burn.

Its the same clone.
The two main differences this run are the substitution of liquid nutes instead of dry nutes, and the frequency of nutes.

I thought I had figured the amounts out to be the same for every watering vs. every 3rd watering, but I guess not. I don't measure ppm.

Perhaps the frequency caused some nutes to get locked out?

I'll post an update once the lights come back on.

Thanks for checking up on me.

Update:

I watered with an AACT last night and continued to foliage feed with Maxicrop Liquid Seaweed.

Today, some of the effected leaves seem to be starting to regain their colour. A few of the more severely damaged leaves are beyond repair. The rest of the plant is still healthy, so I should be ok.

Thanks for the help.