It's been longer than 6 weeks, maybe 8 so far?
I thought you said 3?
6-8 weeks since seed maybe?
how tall were they, how many sets of nodes before flower
time frame is not so important
if the plant lacks vigor it will be at the 2 week stage at 5 weeks, if it was not healthy it would also be behind time
if you think you did all this right and it was 1ft tall or more with plenty of nodes before flower then it looks like the genetics you have are poor
even a 14-16 week sativa would be showing pistils or male flowers at this stage
maybe you could trim them down so they do not take up much room and start some new seeds at the same time
even if these plants go into flower soon it is likely they will be slow to develop and mature
peace
I saw no signs of gender. mb you saw something I didn't? 3 weeks since you flipped them is plenty of time but just wait another week before you throw anything away.
by the looks of them compared to pics of my last grow i just looked at,they should start popin hairs or pods within a week,last grow was outdoor,and they took about 8 weeks from seed to showing sex,but that was outdoor in sunlite
1.5 feet tall and 3 nodes, that don't sound right to me lol