Did you start those plants in those 4L pots or repot from smaller ones? I haven't done a lot of autos but this year I put 9 in the garden with lots of room for roots so hoping they do decently. Ones I've grown indoors before in smaller pots stay really small and hardly worth growing. I live way up in northern Alberta so regular plants won't work so trying autos outside again this year.
I've always hear to start autos in the biggest pots possible for the biggest yields possible. I don't want to grow them indoors other than to breed them as 50% more light for way less yield is too expensive for me.
Good luck!