Any ideas what this is

Any ideas what this is? 6 weeks into flower, the temp is between 28 and 30c, humidity is between 55 and 60% RH with a good air exchange/movement. EC is going in at 1.2 and coming out at 1.3. Ph 6.0. The problem is at the top of the plant, not the bottom. And it's getting worse and spreading.

What I see is immobile nutrient issues. Rather that’s over feeding of something else (NPK) making it harder to uptake immobile or ph issues in the root zone I don’t know.
@harrychilds

CaliRootz88 said:

What I see is immobile nutrient issues. Rather that’s over feeding of something else (NPK) making it harder to uptake immobile or ph issues in the root zone I don’t know.View attachment 5149943View attachment 5149944

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So it looks like I'm suffering from a calcium and magnesium deficiency? But if that were the case why is my EC going in at 1.2 and coming out at 1.3 EC? Should I slightly up my nutrients? I'm using Canna A&B and I have just started using 5ml of Canna PK 13/14.

CaliRootz88 said:

View attachment 5149945View attachment 5149946

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The only thing I can gather from that is I might have a salt build up in my coco?

It’s possible. Do you water to run off? Do you ph your waterings/feeds? I’ve heard in coco it’s important to have a certain amount of run off to avoid build up of salt. Does Canna A&B provide immobile nutrients?

CaliRootz88 said:

It’s possible. Do you water to run off? Do you ph your waterings/feeds? I’ve heard in coco it’s important to have a certain amount of run off to avoid build up of salt. Does Canna A&B provide immobile nutrients?

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Yeah dude I water to run off everyday and PH my water/feed everyday to PH 6.0. And yeah Canna A&B provides the plant with pretty much everything it needs, from start to finish.

Hmm.. I’m stumped. What week of flower are you in?

CaliRootz88 said:

Hmm.. I’m stumped. What week is flower see you in?

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week 6 dude

CaliRootz88 said:

Hmm.. I’m stumped. What week of flower are you in?

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Would Senescence explain it?

Week 6 is early for senescence. Your nutes and medium I don’t have experience with personally. If I had to guess it’s one of issues.

salt build up in the medium

ph is off

Not enough immobile nutes

Your feed is imbalanced (NPK) to your plants needs and causing immobile nutrients to lock out

Nitrogen

I don’t see any pictures.