Ok, so as I was filling out the troubleshooting form I think I may have stumbled upon my problem, but would still value any 2nd opinions on my remedy and maybe this could help someone else too.

E-indoor or outdoor: Greenhouse added on to back of house
E-soil, soilless, coco, aero, or hydroponic: Soil
CSL-Soil type/brand: Miracle-Gro Organic Choice Garden Soil, Miracle-Gro Organic Choice Garden Soil - Scotts Miracle-Gro
SCLR-Soil or slab runoff pH: 6.4ph runoff
E-Water source: 24hr city tap water, ph'd down from 7.0 to 6.5ph
E-Source water pHL: 7.0 ph'd down to 6.5ph
E-Age of plant: 3 1/2 months
E-Type of fertilizer: None for a week, then 3tsp Fox Farms Grow Big 6-4-4 & 2tbl Big Bloom per gallon h20
E-Rate of application: Once last week
E-Lighting source and distance from plant: 20-22" from 1000w hps and a 400w mh
E-Air temperature (both day and night if you are running a dark period): about 75F day and 65F night
E-Air % Relative humidity: unknown inside greenhouse, however weather websites say its in low 90's outside
E-Lighting schedule: 24hr
E-Type of ventilation your room has: 2 fans to circulate air around greenhouse always on

I inherited this northern lights in a 1 gallon soil pot and its leaves were yellowing, drying up, and falling off. I transplanted it from the unknown soil to a new 3 gallon of miracle-gro organic choice garden soil due to it's nutrient content of .1-.05-.1 so that I could flush it with 24hr city tap water that had been ph'd to 6.5, after not seeing much reaction about 10 days later I was worried it was possibly deficient in something so fed it some Fox Farms Grow Big 6-4-4 and Big Bloom at the above dosages when watering. Now about a week later after 2 feedings with the nutrients it has only gotten worse. The plant was already very slender and lanky when I got it and had very small and pale green/yellow leaves. Now even the newest growth can be seen turning both yellow from the tip down and curling downward while at the same time a rusty purple or reddish color can be seen until the leaf dies up and falls off.
Upon looking up the soil information I used to fill out this form I realized the product description page made it apparent that it should not be used in a container as it will suffocate the roots, it is meant to be mixed in with the top of native ground soil. So today I transplanted it into a 2 gallon pot of Black Magic Potting Soil and thoroughly wetted it with 24hr tap @ 6.5ph and plan on using only water for a week or so to see how it responds to the transplant. Also, I did note when putting it in the new soil there was not much of a root mass and it hadn't really branched outward, so this may give some evidence of that outdoor soil restricting the roots.
If anyone has any question or comments I'd love some feedback on my diagnosis and treatment and if there's anything you would have done differently or if you think it's something else completely different causing my problem then please speak up so that others can learn from my mistake as well. I really hope it pulls through, I've heard good things about the resilience of the northern lights strain, so I'll follow it closely and keep updates and pictures coming. Thanks
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Dreadscale Reviewed by Dreadscale on . Northern Lights Dying Ok, so as I was filling out the troubleshooting form I think I may have stumbled upon my problem, but would still value any 2nd opinions on my remedy and maybe this could help someone else too. E-indoor or outdoor: Greenhouse added on to back of house E-soil, soilless, coco, aero, or hydroponic: Soil CSL-Soil type/brand: Miracle-Gro Organic Choice Garden Soil, Miracle-Gro Organic Choice Garden Soil - Scotts Miracle-Gro SCLR-Soil or slab runoff pH: 6.4ph runoff E-Water source: 24hr city Rating: 5