Yeah, what puckuck said. Your light is way too high from the plant! What type of lighting are you using? If it is CFL, then it needs to be inches from the plant.
you need to read up on the subject m8. in some cases a lot of reading is needed , what every one else is saying is 100% get yersel some energy saving light bulbs they are quite cheap , and dont give off a lot of heat , anyhoo best of luck pal jofey
keep you light closer and she will bush out just dont put it so close that it will cause lamp burn, you can also top it or super crop when she gets old enough
what kind of light are you using and how many? if you want some better but nor super results i would look into a high powered cfl. i had a 125w it couldnt do much but it did what i needed it to. harvest about 3/4 oz my first grow. i upgraded to a pg-180 led about a month ago and you can deff tell the difference it makes. research lights. very interesting and with the right light nothing can really go wrong. except grower problems.