DWC using Aqua vega and aqua flores

Hi guys, I'm currently in the middle of a big bud grow and was wondering when to change my girls onto Flores?? I know it says on the bottle to start using at show of first flowers but does this just mean the pistils or once they start swelling?? i have done this grow before but been away from growing for a few years so just wanna get everything bang on. They've only just been changed to 12/12 so it will be few weeks off yet just wanted abit of advice

big bud 4weeks old grown from seed

bump

usually on veg they don't show sex? start your flower nutes about a week after 12/12. if not as soon as you go 12/12 those are big already.

looks like your gonna need to tie them up too. the buds get heavy really fast and dwc unless you have a fan from the start on the tend to be a little weak in the branches . been doing it for a few years. need a pointer ask ill do what I can.

cheers for the reply, they're showing female now but shall i wait till they start growing bud before i swap to flores and boost? another thing is does this canna boost affect the ph and ec?
im gona tie the bigger one up asap. i let it get bit to big waiting for the smaller one to catch up, as u can see it never did haha

Hey mate I use canna veg and flores.
Feed veg nutes at least 2 weeks after 12 12 flip. You will notice the furry tops after 2 weeks then start using your flores.
Works for me.
I'm also growing sensi seeds big bud.
3rd week of flower

cheers pal going to change em today
thats looking good fair play