Jock horror

Ok, so i got 10 jock horror seeds of nirvana sold 7 of them to a mate for $30 lol and 2 died so ive got one left. It's now been growing for nearly a month and is still only about 2 inches tall. Not much of a setup either because i broke the fluorescent light and couldnt be assed buyin another one. I used miracle grow for nutes and its grown in compost. anyone have any ideas on how i could make it grow better because i really dont have a clue and i think my one remaining plant is gonna die soon because the leaves are starting to droop and the stem is super-thin. any help would be appreciated

thats what i mean, theres no setup at all. just a plant and a pot and thats it lol might get an hps light of ebay or somethin