This.
I see it all the time, on here and other outlets. You have a plant in a massive pot and only watered the middle bit. Why? What is the thinking?
The wife and I watch quite a few gardening and horticulture videos (Cannabis Youtubers generally know fuck all.), specifically to do with growing vegetables in containers. When potting up the advice given with any plant is to water it in to it's new pot. When you pot up you want the plant to fill that pot with roots as quickly as possible. A plant, any plant, will not send roots out into dry medium.
The other day I went from 2.5L pots to 17L pots and within a few days I had roots appearing out of the bottom drain holes. I am not saying drown the thing, just water it slowly until you get a little runoff all they way around the base of the pot.