For an easy build do fox farms ocean forest for bottom 2/3rds of pot and fox farms happy frog for top third and mix in some worm castings ..... mix in worm castings into each soil, up to 25% castings if you like, and then build your pot ..... the happy farm has about a month of nutrition but supports rapid root promotion while the ocean forest has 3-4 months of food and helps make bigger buds .... the balance of the fertilizers can be watered or sprayed applied .....
Myself, I’m a Humbolt County SuperTea / Budswell Guano Guy, used for many years in my vegetable garden and will incorporate into my mix knowing it maybe used before she gets down to bottom but ya, I’ve always tried to tweak any planting and some years I plant a ton of different garden - trees, etc - Organic I grow ...... most other supplements I source local or via the web .....
I’ve also been a seaweed, kelp, fish fertilizer and or supertea or Budswell and molasses into each watering but all in small amounts and different each watering, rarely ever measure, rather go by color / eyeball, always use way less then directions as I’m counting on my soil to do its thing ...... if I see an issue with my plants, I pull out my reference books and figure it out like with my river birch tree, she needed more iron so she got and responded nicely, Milorganite worked in that case!