i`d say at 4 weeks old they should be in much bigger pots.They`ll be route bound to fuck and one pic looks like u got 4 plants in one pot
Re-pot them soon as!! i`m surprised they`ve grown as big as they have in pot noodle pots!!!!! Dunno what u can do about the ones in the same pot as u won`t be able to seperate them now without causing too much damage to their roots
They wanna be in pots 4 times that size at least though and one plant per pot always!!
digi