GG4 Auto / Auto#1 - First grow

Hello Growmies! Similar to last week im trying to be a little more hands off under advise from close friends. This week all girls have begun flowering and as such ive begun the feeding albeit VERY gently. As i've already learnt within this grow, less is more! Im still to grasp a better understanding of more appropriate use of nutrients. It would be good to know why im applying the nutrients rather than knowing that I should be giving them. Once again any knowledge that could be passed on is always appreciated! The GG4 was showing signs of flower last week, however has well and truely kicked in. She seems to be stretching well, whilst filling all available space to her. Whilst ive I think ive done a reasonable job on the LST, ive noticed that some are now starting to raise higher than others. Perhaps if I had a net I could resolve this better by using this? However it currently isnt proving an issue and will just have to be tracked throughout flower. However thoughts on how I could better manage this would be appreciated! The two remaining Auto #1s have joined in flower and are looking squat and bushy! We will see what the new few weeks bring, I kinda feel bad not talking about these two girls more but the GG4 is really stealing the show for me at the moment.