What do I have here

[freezeland2]

Are you sure you aren't overwatering? Those leaves look mighty plump.

I agree the main culprit looks like light burn but the edges burning like that could be nute burn? Especially since it's coming from the bottom up. I don't use dry amendments so I'm not sure if you can nute burn with them.

You can over feed dry amendments leading to burn.

 

[Wyodub]

I think a lot of what is going on can be improved if you got the vpd under control. I’m making some assumptions here but if temp is 80 and rh 45% the plant is over transpiring. If temp were 70 and rh 55% the vpd is in a safe zone but it is to cold to transpire correctly. Do you have any means to control the temp & humidity parameters to achieve the correct vpd for the plants growth stage. You would probably see some improvement if you can achieve and maintain a vpd of around 1.2 kPa.

Yes I do have some janky controls that will be upgraded on the next run. Most days we’re sitting around the sweet spot of 1.2 KPA but then things get out of whack so I’m sure you’re right

 

[Wyodub]

You can over feed dry amendments leading to burn.

I’m sure I had some over watering issues that I’ve been getting corrected

 

[mysticepipedon]

I'm not seeing the burn on the top of the plant, which makes me lean toward a slight K deficiency.

 

[Alwispy]

Yeah it’s old but I’m curious what the outcome was, and what the conclusions were ? Cheers

☀

 

[Imzzaudae]

I'm also leaning toward Nutrient burn. A little visible clawing, Dark green color and of course the burned saw tooth edges. Canoeing leaves indicate light may have been a little intense but the leaves don't look burned. I'd flush this plant big time. Run 20 gallons of water threw it. Then let it dry out. If the soil smells swampy transplant it.

 

[Cirroji]

Any update ? been a couple weeks interested to see how it has progressed/regressed