How could one modify Subs SS to VEG for only 30 days, and finish off in a 5gal?

Hello!

Im growing out Agent Orange, Vortex, and Strawberry Diesel from seed in search for some Phenos.
IMG_2173.jpg

This is them about 2mo ago, I kept 4 of the 5 each. AO on the bottom, Vortex in the middle, an SD on top step.

Out of the four 2 were ladies, each so 2 AO, 2 V and all SD were Fems
Both AO are tall and lanky, same as the Vortex, SD is nice and squat...

Any ways they are 2 weeks to finish using 5gal white square pots w/ Sub SS, RO water only, I do use some Fulvic Acid
They are sitting next to(i will post a pic of these tonight): 2 Giga buds, 2 Skunk#1, 1 Cheese, and 1 Great White Shark in 7gal pots also with Sub SS.

I clean up my plants after their 3 week stretch In 12/12( kind of lollypoping ), I cant help but think that that is 12in or so of waisted growth because i just cut it all off...
12in of growth = about 3-5 weeks of waisted electricity, time, and general care in the VEG period($$$24hrs of light$$$)

So what N source in Subs SS would i cut back on to accommodate only a month of VEG
I would VEG 3-4week in a 5gal white square pot after being transplanted from a 1gal pot of Roots Organic

Also, would the P be available that much sooner, because i am shaving a whole month off of my veg, the soil is designed for 2mo veg and 2mo flower.

What do i do? Take out some worm castings, or 1/2 the Bone Meal...

P.S. I will put an updated Pic up tonight of the ladies

IMG_0372.jpgIMG_0373.jpg<--- this is the AO we run did a reveg on it last year during the summer its a nice nice plant. Also less veg time means less root mass, could see a downturn in yield.