An AK-47 clone that is currently ~3ft tall (from the top of the soil to the top of the plant). The date on the ID tag for the plant says 7/19 so I'm assuming it was first planted ~11 weeks ago.
The plant is currently in a section of my closet that is 18" deep, 54" tall, and 60" across and is inclosed on three sides by walls lined with white foam board to reflect light. The 4th side is open but there is a black sheet that covers it completely during the dark cycle. The problem with the location is that the closet stays pretty hot (~85 F during the day and ~75 F at night), however it is not very humid. There is only a small window on the opposite side of the closet that doesn't provide very much ventilation, however I do have a fan sitting in the window to bring in cooler air and there is also a tower oscillating fan pointed towards the plant. I am looking for any ideas on how to cool down the closet because I've heard optimal growing temperatures are ~75 F during the day and ~65 F at night.
New Wave 42: T5 High Output Fluorescent Fixture (47" long x 6" wide x 3.5" deep) with two 46" 54W (total of 108W) Philips Alto Silhouette High Output Lamps. The fixture hangs ~7 inches above the very top of the plant. I got the plant around 6pm yesterday and was told to put it into the 12 light/12 dark cycle so I placed it in a completely dark room until 6am and then turned the HO lamps on all day. However, I was doing research and found that the 12/12 cycle is mainly for flowering and I was thinking of trying to keep it in its vegetative state so it can grow larger before flowering. To do this I have currently left the lights on for 16 hours (the first complete light cycle) and am now going to keep the plant in the 16 light/8 dark cycle. Is this a good idea or is my plant large enough to let it go into its flowering stage. The plant is female and has visible white pistons, forming the characteristic V-shape, at many locations over the plant.
The Soil/The Fertilizer:
Unfortunately we do not know the composition of the soil but the plant is in a 3 gallon pot. Today (day 2) I bought, and used for the first time, liquid plant food that is 8-14-9 and labeled as African Violet Plus food. At the dispensary I was given a packet of roots organics by aurora, Oregonism XL which contains 5% kelp, 25% yucca extract, 3% humic acid and some bacteria. Should I use this instead?
I didn't water it at all yesterday (Day 1) as I did not have my set-up completed yet, but today I've watered it twice (about 4 hours apart) with distilled water. The first time I watered it I used 1 quart on the soil and then misted the plant with more distilled water. The second time I watered it I again used 1 quart of distilled water with 7 drops (as directed) of the 8-14-9 plant food. I had been misting the plant intermediately to keep it cool since the closet is so hot.
During its first light cycle in its new grow area today (Day 2) several of stems of the more mature leaves turned red colored (I believe indicating a N-P-K deficiency), and also several of the tips (and even some of the edges) of the more mature leaves have turned brown and appear dead. This is occurring from the top to the bottom of the plant. However, the younger leaves are a bright green color and appear healthy. What is going on, and how can it be fixed?
It has been ~28 hours since I've had the plant (12 hours dark followed by 16 hours light) and it has just started its 6 hour dark cycle. I am not completely sure at what point in its life cycle it is at, but I believe its in either pre-flowering or the very early stages. Pictures should be posted and any feedback and advice that you can offer would be greatly appreciated.