hey there , you're in flower, you can tell by how the plants are pushing out those light colored and different "pre flower" biomass at the flower nodes up and down the colas. Hope this helps ! 🚀
The big girl 100% yes get in there and clean up the bottoms of any shaded branches.✌️ personally i think its helped me to have bigger bulkier upper buds.
cant see week 4 photos but as I open week 5 photos in a new tab, you have some preflowers and congratulations you are going into flowering.There is going to be some stretch for the first 3-4 weeks,lets say until week 8. then you are fully into flowering mode.