It's a girl! Now for the tricky part....

Well, right now i'm a little over a week into the pre-flowering stage. I see pistles...so i'm keeping my fingers crossed and hope i have baby girls all the way. anyway, the first few leaves (all the way on the bottom) are turning yellow. I know it should be norm for the plant to turn yellow mid-late flowering, but i am far from that. I am thinking about transplanting before i even hit the full on flowering stage but dont know if its a good idea or what mix.

I'm currently using black gold organic w/ no nutes. since i'm still a week into preflowering, I want to transplant them into 3 gal. but dont know what combo to go with. i know i should give my babies a little more N in preflowering so it has an easier time during flowering.

SO FAR I'M LEANING TOWARDS BLACK GOLD ORGANIC W/ PERLITE.

or

BLACK GOLD ORGANIC W/ OMRI ALASKA FISH FERT. EMULSION

If i'm gonna transplant with black gold again, should i monitor and wait a week to add the fish fert or will the nutes in black gold organic be enough to last my girls through harvest?

thanks