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This might sound off the wall but I think this looks like potassium toxicity. both magnesium and potassium are mobile nutrients and would not show on newer growth? I’m not saying I’m right, just throwing ideas out. If your ph is truly 5.6 that is a problem also but that seems unlikely.

I would too dress the EWC, can’t overdo them. They really help with soil health. The key here is soil health, feed the soil to be healthy and the rest will follow. You would mix all the solutions together in the same waterings.

I believe that was the runoff? He stated watering was 6.5? Did I miss read something?

Any updates?

Not sure if this has been mentioned yet, just top dress with more SF soil.

Take detailed notes of what you have done each grow and when. That way you can adjust things each grow and revert back to what worked better.

Old growth does not repair itself. You will notice the leaves standing up and an pickup in growth if all the plants needs have been met, time frame for organic is 7-14 days to break down. Advice for bloom feeding. That can be difficult not knowing what is in the super soil you are using. I would...

Looks like a root problem to me, but iv never done DWC. Someone else might have more info. Any possibility you are mixing nutrient solutions in the wrong order?

Yep, then I would just use that and skip the fish mix

If this was my plant I would keep it simple and safe, I would use a couple handfuls of EWC, supersoil 1/4 strength of fish mix washed in with black strap molasses1/2 tbs/G, I wouldn’t go heavy on the nitrogen. I think what you’re seeing is a nitrogen deficiency caused by the pre flower stretch...

Some of the tips look like she was hit pretty hard with the nutes, new growth looks better. Have you been giving her calcium? Maybe too much? What about the light intensity, are you sure it’s not to much? Also I never water to runoff with organic or measure any parameters. Can be very misleading...

You mentioned runoff measurements, how often are you watering to runoff?

Also kinda looks like it doesn’t like as much light as the others, or it was in a hot spot maybe? Is she a different strain?

Just a little to much nitrogen. Probably not as heavy of a feeder as the others.

That’s a really big auto?? Hats off to you!

I don’t remember the exact temp but the room is always around 77 in veg. I could probably go back and look and see what the VDP was by data logs but probably take some time.

Good job! They look great with all the issues you ran into. Definitely a good run! Next will be better!

Definitely over fed, autos want less of everything. Like PAR and nutrients.

Law of minimum, growth is not determined by the abundance of elements but by the least available. Zero water and nutrition could for sure cause the light burn on the plant with nothing for it to repair.

I don’t see anything to worry about. Is that one of the first leaves? If it doesn’t get as much sunlight and help with further growth the plant will start to shed those leaves. Glad to see you getting starting in growing! We all started somewhere. Keep doing your reading and I’m sure you will...