Epsilon F1 1st trial (newbie)

Had a nightmare couple of weeks with these girls. Everything seemed to be going great until they seemed to have started flowering stage, which was 3 weeks after germination! Everything then seemed to go wrong. Yellowing leaves started at the base of the plants along with drooping leaves. Was I under/over watering? Too many/too little nutrients? 1st time using autos, 1st time using cocos and 1st time I’ve had problems with humidity being low (normally a struggle to keep it down) Introduced a humidifier last week and I think I’ve managed to rescue something that looked like it was gonna be a disaster. They’re smaller than I would have hoped/expected but that’s down to my errors. It’s definitely been a learning experience and I’ve got quite a few things to change with the feeding and set up with these autos, but the fact they’ve managed to bounce back is testament to the mistreatment they can handle. It’s 7 weeks since I put these seeds in to germinate but they’re ready to harvest in the next couple of days. It means I haven’t had time to flush properly, but like I say, I’ll learn from it for next time I hope.