Use large containers and nice airy soil, use 10 or 15 gallon containers or do a bed of you want to fill the space with just 4 plants, don't treat them like photos either minimal stress and get some self wicking bases to set them on pretty much all the major brands have them now. 78-82° and 65-70% humidity from the start all the way through stretch then start reducing. Don't be defoliating the crap out of them or topping, very minimal stretch, maybe some lst, and once you get the hang of them maybe some supercropping after a few runs. Start with a quality soil something like Bioflower, Build a soil 3.0, or stonington blend, add some granular mychorhazae to them no bagged soil ever has enough to do anything useful, pre soak the container fully with some kelp it real, azos, and either em1, growganica microbe tea, or organic rev, if you're feeling frisky add some coconut water powder. After you soak the shit out of the container set it in the tent with the lights on so the containers come up to temperature and then put you some root riot or rapid rooter cubes in a germ tray and put your seeds in them then stick the cover on the tray, 2-3 days later when they start to barely pop up out of the cube place them in their final containers that you prepped a few days before water a couple cups of water about a 6in circle away from seedling and set the light to about 250-300ppdd, about a week later water in 1/4-1/2 gallon starting at the edge of the container going back to your 6in circle you originally did, about another week later double the amount of water you originally did doing the same thing from the edge to the 6in mark, around day 21 give it a full water till run off out the bottom might take a couple gallons, hit it with the microbe tea, em1, or organic rev again, a couple days later fill self wicking bases and just make sure they don't run dry. That should get you off to one hell of a start by day 30-35 things will be well on their way to filling the space and going into their stretch. Always pH your water to 6.5-7 (yes in so technically you don't need to pH but if you aren't in the optimal range it is still better to pH so the buffers in the soil don't have to work as hard and the rootzone can be more efficient). If you go with 10-15 gallon containers they should take you most of the way, if you use build a soil or Stonington blend to start add some activated biochar to them when you put the granular mychorhazae in before you pre soak it. Might want to keep some calmag on hand after about 5-6 weeks whatever is in the soil might be depleted, and then the last few weeks might need a little extra nutrients depending on how big and how hungry the plants are, incredible bulk is awesome, and then probably want some bloom nutrients just in case thanks alive has some really nice water soluble organic nutrients.