I'm a first time grower, just over one week into a 12-12 light cycle on a 4 month old Super Silver Haze mother plant. She was beautiful and healthy throughout until a few days ago, when I noticed that the leaves on the underside and interior were yellowing, curling, wilting, and being shed. The growth down there is very spindly as well. The tops look great, except for some stretching. 
She's getting a 1/3 dose of Hygrozyme and Botanicare Flower Power 2-2-5 Bloom food twice a week, which is every watering. The temperature stays between 74-81F, and humidity is 36-47%. The plant is in a reflective cabinet that's left open while lit to allow air circulation from the cracked open bedroom window, then sealed when the lights go out. There's a minor gnat issue, which I plan on treating by spraying with diluted neem oil.
The first photo is of the tops, which appear healthy. The other three show the spindly growth and curling, yellowing leaves below.
Is what's happening to the lower leaves to be expected, or am I doing something wrong? What could be done to correct this?
Thank you for your help!
She's getting a 1/3 dose of Hygrozyme and Botanicare Flower Power 2-2-5 Bloom food twice a week, which is every watering. The temperature stays between 74-81F, and humidity is 36-47%. The plant is in a reflective cabinet that's left open while lit to allow air circulation from the cracked open bedroom window, then sealed when the lights go out. There's a minor gnat issue, which I plan on treating by spraying with diluted neem oil.
The first photo is of the tops, which appear healthy. The other three show the spindly growth and curling, yellowing leaves below.
Is what's happening to the lower leaves to be expected, or am I doing something wrong? What could be done to correct this?
Thank you for your help!
