1st Grow!! Indoor QB Led grow - 4 strain

Wazzuuuup guy’s? So it’s week 7, the lady’s are officially on the flowering stage!! (Since 4/10) It’s all going very well, they are happy and so am I, been watering every 3-4 days with 1.2l each (before flowering I’ve watered with approximately 2l) and they have good colour and you can see some stretch. Well, not much but they are trained after all 🤷‍♂️🏻 Just some yellow leafs below the canopy but guess that’s normal, they are really needing some defoliation but I’m going to wait 2-3 weeks because I don’t want to stress them on this early stage I’m thinking about adding the scrog net but I don’t know if it’s too late for that, what do you guys think?