pot size situation

ATM plant is 7 weeks old and looks perfect.I will change the time period to 12 hours for flowering.The thing is pot size is 17lt.I have transplanted 2 times, do u think i should transplant it to a bigger pot or 17lt will be enough till the end?

17lt will be fine, how tall is the plant? and what light you useing? as that going to be a big plant.