Hello H At 4 weeks I would not start inducing yet.
Like Digi and Latewood say, split them up into larger pots, but cannabis plants grow a very large root system so they will be all tangled toghether, be carefull how you seperate them.
Put them seperate in larger pots and don't rush for inducing, give then mabye a few more weeks and they will show improvement

I've just started inducing my lastest crop at nearly 7 weeks and I have doubts about doing that so soon but they have grown very well so I think it will be ok .......................I hope

love mand xxx
mand Reviewed by mand on . updated updated pics Rating: 5