We do all of it when we are getting it ready, then put it in the tent and start watering it normally.
Then we will do an Earth Dust boost which is our bloom feed a week before flip. We might add Recharge depending on how things look.
We water with Sticky Icky every other watering in flower.
That's pretty much it.
Most everything else is controlled with lights.
Kelp and alfalfa would be good. I would also get some corn and lentils for sprouted seed teas. Depending on where you live I would pickup some rock dust... East coast - granite dust, west of Appalachian - basalt dust, everywhere else Azomite.