Paris XXX leaf issues during flower - getting worse, need advise

Hello - Anyone have some advise on what is going on with this girl? The leafs are getting this orange / rust color in the center and base areas of the new leaf growth throughout the plant (high and low). I know I've got some nute + light burn going on at the tips, but I've never seen this condition on the leafs in the inner/center part of the leaf. Most of my research into leaf issues points to a boron deficiency, which should be pretty rare in hydro assuming you don't have a PH issue. I did a full water change two days ago and changed the nutes from the GF 2-part to GF's 3-part with the micro nutrients, issue is still getting worse.

Dutch Bucket Hydro
GH 2-Part nutes + cal mag + epson salt ||| Now GH 3part + cal mag + epson salt (~950 PPM)
SF-2000 LED at about 24" above the plant
Tent temp low 80's during light on, mid 70's lights out.
water temp: 68F
PH - low 6's, now at 5.9.
Roots are healthy - no slime (coloration is from nutes)

Much appreciate any input on this, I've done many grows in this setup and haven't seen anything like this. Wondering it it's just the pheno I popped, too...

What ec is that?? 950 ppm seems like a lot. Most hydro people are between 1ec and 1.5 ec for the entire grow.

Depending on the scale that is 500ppm or something like that.

In theory you should be starting low and then increasing as the lower leaves start to yellow.

Do you have a fan blowing in there? I do not see one

Hey Failmore - thanks for reaching out. Yeah, there is a ocsillating fan down low pointing upwards (black) in the bottom pic. I just checked ppm again, and I'm down to 830ppm and the same ppm/ec meter is reading 1640 us/cm. I've run some grows higher if the strain can take it. I think 800-900ppm in hydro is pretty common. I have a homemade strain next to it (Sunset Sherb x Fire OG) that isn't showing leaf issues at all and I create the same nute mix for both....

AZCrypto said:

Hey Failmore - thanks for reaching out. Yeah, there is a ocsillating fan down low pointing upwards (black) in the bottom pic. I just checked ppm again, and I'm down to 830ppm and the same ppm/ec meter is reading 1640 us/cm. I've run some grows higher if the strain can take it. I think 800-900ppm in hydro is pretty common. I have a homemade strain next to it (Sunset Sherb x Fire OG) that isn't showing leaf issues at all and I create the same nute mix for both....

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Seems for that plant it is to much for her then.

The difference between 2 plants can be silly in terms of what they need for nutrients.

I pushed past 1.5 ec 1 time and 1 of the 3 plants fried. While the others loved it. Kinda why I stopped doing multi strain single res.

I am kinda stuck on the fan thing tho? So there is a fan blowing up? But not across the tops? Cause it looks like the heat is getting trapped in the leaf clusters.

Hard to say for sure. Are those buds possibly rotting?

I don't disagree on the nute differences between strains, and even different phenos of the same strain. It might be too much - I might flush and run water only for a few days.

Each plant has it's own res.

The fan is pointing basically at the top of the plant but shooting up from the floor at an angle while it's oscillating between the two DWC coolers which has the tops moving around quite well. I'm in AZ and it's bone dry here now - humidity in the tent is 30% or so, which is low for flowering but should keep molds, ect at bay. The flowers themselves look ok at this point, but with 5-6 weeks of flower time left (min) I'm concerned they won't be looking good for much longer.

AZCrypto said:

I don't disagree on the nute differences between strains, and even different phenos of the same strain. It might be too much - I might flush and run water only for a few days.

Each plant has it's own res.

The fan is pointing basically at the top of the plant but shooting up from the floor at an angle while it's oscillating between the two DWC coolers which has the tops moving around quite well. I'm in AZ and it's bone dry here now - humidity in the tent is 30% or so, which is low for flowering but should keep molds, ect at bay. The flowers themselves look ok at this point, but with 5-6 weeks of flower time left (min) I'm concerned they won't be looking good for much longer.

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Weird. Hopefully they make it to the end. Some plants just have weird genetic stuff going on also. One of my current plants has splotches on all the leaves. Been like that since sprouted.

Nugs look nice and tight. I would just check one maybe and make sure it is not rotten inside. About the only other thing I could think of that would cause browning like that