7 week old plant check it out

i have a 7 week old plant its from a blue cheese plant that i discovered the seed, i planted the seed in a small pot first the plant sprouted nice and i only watered it bottled water and its pretty big now i transferred that plant to a way bigger pot and its about 17'' tall the stalk is about 1'4 inch thick its been on a stable 18/6 light cycle with a room temp of 70 to 75 degrees no nutes just water and plenty of air and light... i need someone to help me figure out whats the next stage on my plant so if u can help it be greatly appreciated here are the pics camera phone pics but better than nothing....

yeah the next step you should start the plant on a 12 on 12 off cycle to get it ready to start the flowering cycle so it can produce buds

looks pretty stretched, what kind of light and how far away is it? what color spectrum? your next move should be to let it mature and show preflowers(if it hasnt already) and/or alternating nodes and then flip into flowering. lighting is really important. thats why i need that info. you dont have any money to at least get some cheaper nutes? you can also get ulsulphered blackstrap mollasses pretty cheap to start adding when you go into flower, 1 tbsp a gallon. I still advise you to buy some nutes though. other than that it looks like your doing good and the plant is healthy, its just that its not thriving. lol

what lighting you using on that ?

if you have a streatching problem i would recomend a fomula call BRIX+ its for flowering works very very well it inhances yeild helps fill in colas , taste and quality