thoughts on my next personal grow

so im wanting to try something new this grow. i want to grow 1 plant to fill a 4x4 canopy semi-organically.
specifics:
4x4 tent
hlg 600h
strain: skywalker og
autopilot enviro/c02 controller (avg conditions 82*f/54%/rh 1000-1200ppm)
1 4" scrog (how high above pot should this be mounted)
1 6" scrog
this is where my questions start
1 pot either 15g or 25g how big is to big
soil i have multiple options but im thinking either
A) store bought super soil in bottom half/ ffof in top half
B) i have tons of used soil from my outdoor crop this year i could re-amend if i could find a simpler recipe without a mile long shopping list of ingredients

base nutrients I don't really plan on adding much unless i see deficiencies however im going to keep around a bottle of this stuff https://www.earthjuice.com/products/earth-juice-sugar-peak-flowering

additives: this list is always open
liquid kelp
mycorrhizae i have a few brands on hand (great white, orca, oregonism, mykos, recharge)
guano and ewc for top dress
thinking of adding the usual boosters (mkp, magnesium sulfate , and potassium sulfate) any reasons not to?

not sure if it would be needed but i can post pics of the tent in the morning however lights are currently out
any advice recommendations or criticism is welcome im not extremely well-versed in organics but im trying to learn

forgot to mention id like to take every opportunity to raise the brix level of this plant as an experiment if you will id love to hear some recommendations of ways to do this i plan on adding basalt to the soil mix but the fruit fermenting and the like sound like they would produce some pretty narly stenches so i want to avoid making them but maybe a premade bottled version haha

I suggest amending the soil you already have. All you need are a few inputs, compost, and fertilizer to be mostly water only. I also keep soluble organic fertilizer like liquid fish on hand in case the mix falls off mid bloom phase. What most people overlook when they want to get away from using nutes is compost namely worm castings. It has all of the microbial activity needed to drive your soil and some of the fungi as well. Adding granular myco like you mention will help with absorption. Add up to 1/3 of your mix as worm castings; that will likely make your soil heavy and mucky so add in some perlite and coco to lighten it up. Compost, especially if it is homemade, will make high brix soil...most bagged castings come from worms fed mostly shredded paper. So having a worm bin is ideal and will provide vermicompost free for life...
In addition to all important compost you will need a fertilizer. I prefer chicken manure myself but you can use guano, cow manure, or veganic ferts like comfrey and/or kelp meal. You want to add in lots of different things in small amounts. You will need mineral inputs like basalt and/or rock dust is good; there are many options. I add garden gypsum, dolomite lime and crushed oyster shell at each amend/recycle. The more you amend/recycle your mix the better it will get.
A 10g pot will sustain plants through bloom phase; no need to go much bigger unless you plan to grow monsters. For bloom phase I like to transplant into 10s just before the final flip. Some chicken manure or other fertilizer laid directly in the bottom layer helps. I also suggest trying Jobes organic spikes; put 2 in each container. Try feed for 8 weeks; you just plug them into the dirt easy breezy....
Speaking of monsters if you wanna see how I do it fully organic water only check this link...

How are u cooling the area because if your venting your wasting a awful lot of co2

Gond00s said:

How are u cooling the area because if your venting your wasting a awful lot of co2

Click to expand...

sealed lung room with multiple tents i run a/c and dehu outside of tents

Richard you have given me alot to research i thank you however rest assured i will return tomorrow with plenty of questions mostly regarding composting and vermicomposting

so been busy and havent had much time to research however i do have a one i couldnt find much info on what would i add to a compost pile to make it considered high brix? im guessing minimal greens to keep nitrogen levels lower but what nitrogens i do put in should be high in carb/sugars and phosphorus? i am a complete newb to composting so take it easy on me lol

Fruit and veggie scraps; organic material that contains natural sugars makes for high brix compost. It’s for the same reason people feed with molasses; gives the microbes sugary food so they go and procreate instead of searching for something to eat...