so, obviously it's a closet grow. never heard of AK-48 (ak47?). since it's 2' deep i doubt you'll want to top them into bushes. you'll probably want to take five 3g pots (or the 5g smart pots if they fit), and let them grow to about 1-2 feet tall straight up, and then flower them. unless you want to get all bonzai crazy with your training methods, i suggest you just let them go straight up like christmas trees until you're ready to flip. don't worry so much about adding 'nutes'. Just add about 5-10 drops of calmag into every gallon of water you give them. We usually leave a little room at the top of the pot of the vegging plants for a bloom top-dressing with a light mix of manure/wormcastings/compost. I'd say if you were going to flower the plants from seed, you should grow them out for 6-8 weeks before flipping them (mainly because you have an 8 ft tall ceiling). You could even go longer probably.
