Help! My seelding leaves are yellowing!!

FoxxiRox

New Member
The first set of true leaves yellowed really slowly while the rest of the plant still looked great. I didn't want to freak out cause I know that marijuana plants are pretty resilient so I just checked the ph and it was 6.5 so I just let her be figuring everything would be fine. Now here second set of true leaves are starting to yellow as well and are yellowing faster then the first leaves did ( first true leaves are almost completely dead.) The rest of her still looks great but I'm afraid that over time more and more leavea will yellow. Pictures attached. She is growing in a solo cup currently.The humidity is currently around 30%, looking to buy a humidifier to raise it. The temperature in my grow box ranges from 73°F to 91°F depending on if the lights are on or off and is lined with aluminum foil for reflection. I am using 7 23 watt CFL lights on just her. I am using distilled water that is PH'd to 6.5 and have also have water that has one drop of super thrive per gallon of water that I squirt on the top of her soil between waterings. I am using happy frog soil with a very small amount of foxfarm ocean Forrest mixed in with about 30 % perlite. The PH of the run off water is 6.5 and the soil is also 6.5. Also tested NPK: N - Very high P- very low K- low. I water her 2 times a week, based on how dry her soil is. She is on a 18/6 light schedule and I have foxfarm grow big for her but have not given her any yet. I am considering making CO2 with yeast and sugar and putting it behind the fan. If you need any other info let me know. Does anyone have any idea what the problem could be and what I should do to stop any others from yellowing? I really don't want her to die.
20160819_103904.jpg this is her today
20160819_103911.jpg also that, you can see one of her first true leavea that is almost dead
20160818_114246.jpg this was her yesterday
20160818_114309.jpg this is also from yesterday.. And you can see one of her first set of leaves in this one as well
 

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CH.DEAN

New Member
May be too much nutrition, but also may be a lack of potassium. The possibility of nutritional burns is relatively large, my plant yesterday is the way, I gave him a new soil, and poured some water, and today there is no serious deterioration.
 
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