Crazy problem, no one seems to have an answer.

[Tofasgt]

Growers choice - Northern lights auto
Age - 61 day's from sprout, flower roughly 30 days
Soil - Happy Frog mixed with Perlite
Pot - 3 gal. Fabric
Light - Electric Sky ES300V2
Nutrients - Fox Farm trio and Flower Fuel
Temp - 77-79
RH - 44-49
pH - 6.4 - 6.7
Soil runoff pH - 6.0
Water - Tap water.

Hey guy's, I have a problem here that no one can seem to answer for me. Just started maybe 4 days ago, trimmed all the bad leaves off and the next day they're back and worse. I flushed the girl 2 nights ago and it's worse now than it was to begin with. I am supplementing Cal-Mag at 4mL per gallon twice a week. I mix my fox farm trio by their schedule but at 1/2 strength. I've also added flower fuel since the start of flowering also at 1/2 strength. I also add Recharge at 1/2 tsp per gallon once a a week. All of the spots appear in the same spot (leave center of vein) on every affected leaf. At first the spots were scattered out on the plant, since cutting the bad leaves off it appears to be focusing towards the top of the plant with the leaves yellowing now. It started out with just the brown spots and no yellowing of the leaves. Anyone have any idea what's going on here?

[crucialbunny]

I've seen plants with a phosphorous deficiency that displayed very similar symptoms.

[Tofasgt]

Even with feeding the flower fuel on top of the trio you think it could be a P deficiency? The NPK on the flower fuel is 1-34-32. I was thinking I was gonna burn her up if I used anymore. Lol

[crucialbunny]

Tofasgt I'm not trying to tell you that there is a phosphorous deficiency, only that I have seen symptoms that display the same characteristics caused by it. It's possible you have lock-out from an over abundance of nutrients.

[Rwise]

With the run off being 6.0 the PH is low, flowers like 6.8 in soil.
She cant eat from the soil at 6.0.
She is eating the leaves for their stored nutes.

https://www.growweedeasy.com/cannabis-nutrient-deficiencies-ph-picture-guide

[dilvish]

That flower fuel is pretty high in P & K. My advice is give the plant(s) a thorough flush with properly PH'd plain water to rinse out any build up in the soil. Then use the fox farm trio as recommended...no more 1/2 strength shit. Forget the calmag altogether (that's way too much IMHO). give it 4 days and repeat.

[SoOrbudgal]

I concur with dilvish a tad of over fert.

[Fjeff]

Listen to the masters, correct the PH.