Growing outside in the east of England

Hi all,
I'm pretty new to the growing scene been smoking a long time but people are getting tight on the prices.
I've had a few good results indoors just on a standard 250w setup. I recently went to jamaice and aquired some seeds but the plants grow very big wich is all good if you can fins sumwhere to put them I have a few sprouts growing at the mo outside in pots 2 inches by 2 inches does anybody know when I should re-pot them?
And any other information would be a great help such as tips n hints to get a big yeald
cheers all

get yourself a greenhouse watch sun movement and place it where you get most light most of the time i live in south of england and can grow outside all year now i use parafin heaters to stop rost and grow auto flowering strains which are not light change dependent and as for repotting i use one from start to harvest which is the pot i seed them in

Sounds like you have some bigass sativa tree ur lookin to grow , the rule is 1 gallon of soil for every month your plant is alive . Dont grow sativas in your garden unless u have a bigass fence and neighbours that wont ring the old bill , because as bad as it for u, im going to laugh when im watching anglia news with some crazed stoner running down the street from cops with a bigass satuiva bush in his hands