I thought (still think) it was phosphorus deficiency

Since you weren't fertilizing prior to this, the plant was showing you it needed nutrients. Pretty much any fertilizer will do, but it will not make the existing leaves any darker green, it will benefit the new growth and your bud production though. Don't over do it, just from now on take turns with pure water and fertilized water. She'll grow for you.

u answered u own question man congrats i agree 100% ph causing lockout n ur fix is great but be better if u used proper ph'd water n flush till ph is in range u need 6.5 least just safer roots arent exposed to wild ph flux's n growth/color return days faster but great job on finding problem

Def phosphorus issue, what medium are you in?

You say you didn't feed for first 23 days of flower? They need a lot of nutes during the stretch, I'd go with a phosphorus deficiency due to lack of nutes.

You also are running a mystery bagseed so you have no idea how big/small a feeder this girl is. I'd go hard on the nutes for a while, it also looks like you have a nitrogen deficiency, due to the same thing. Your plants need lots of food during the stretch period, they are growing like crazy!

Well I just finished up for the night, had a bit of an ordeal...

I preped up some water with lime but I didn't measure the ph because I wanted to let it sit a while and come back and adjust it. But I had a complete mind fart and when I went back I just started watering about 1/4 to 1/2 a gal in I realized what I has doing so I stopped and adjusted the ph down to 7.5, it was 8.9, and continued with about another 1 gal to 1.5 gal until run-off. So now I'm a little worried that I hurt things with the 8.9 however since the run-off was still at 6.1 I think there may be some more adjustment needed. Tomorrow will tell the tale I guess.

I'm liking the idea of flushing and depending on how things go I may do that this weekend.

And to answer why I hadn't adding nutes, well every time I did the plant leaves would claw more, I was using FFTB and I'm in FFOF

I just wanted to revive this, I seem to have at least slowed the progression. I do still seem to be getting a few more dead spots each day but this perhaps damage done revealing itself? I will say the number of leaves turning completely yellow has definitely decreased.

I've come back here for some thoughts on how I should proceed, the leaves that continue to show dying spots are in the upper canopy however the lower leaves seem to be looking pretty good.

I'm wondering if I should trim some of the upper leaves to let the light to the healthier vegetation?

Also my run-off after the last watering was testing at 5.8 - 5.9 I'm not sure if I should continue putting lime in the water or use PH up and try to raise the PH of the soil this way? I never did flush any one think I should do this now?

pics:

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you got a lot of brown spots almost even on the buds and sugar leaves. it looks nice and big but makes me wonder about the drainage, could be root rot. over fertilization maybe , bad drainage (always wet?) but it looks almost done, doesnt look all that bad

Magnesium brohym, 2tbsp per gallon
Stop fucking with the PH god damn it! 6.1 Is fine and way better than 7.0, you going from 6.1 tp 8.9 is what will cause problems.
You need to adjust all your watering and feedings to 6.5 using lime
Its not a phosphorus issue, its magnesium

Calcium (Ca) -Macro Nutrient and an Immobile element.

Calcium is another important element that helps the plants cell walls, cell division in making the plants stems, stalks, branches stronger, as well as contributing to root growth, mostly the newer root hairs, Calcium also helps enhancing the uptake of K in the the plants roots. Calcium moves really slow within the plant and tends to concentrate in roots and older growth.

When plants exhibit a Calcium deficiency the younger leaves are the first to show it as well as older leaves. The Leaf tips will die back, the tips may curl, and growth of the plant is stunted. The plant can show a weakness in the stems and branches, as well as a under developed root system that can lead to bacteria problems with roots dieing off.

Problems with Calcium being locked out by PH troubles

Very acidic soils with excessive potassium, dry and or wet soil. Lack of calcium in the soil may cause too acidic soil. This may cause to Mg or Iron deficiency or very slow stunted growth

copy/paste, http://www.420magazine.com/forums/pr...pictorial.html

Are you using RO water? if so you should be suplementing cal/mag


Edit: here's another really good one with more pics.
http://growweedeasy.com/marijuana-symptoms