I think it’s cannabis lol
Truth be told the first thing I thought of was bugs can’t you seal the bottom and edges and any cracks bugs will get through as I fear that they will get some with the setup
As for the plants I prefer potting up
The big pots make overwatering easy
I don’t know how old they are if I did I could tell you if you was or wasn’t by the size
The soil looks a bit compact and could of done with pertlie to allow the roots to breathe better.
It’s not garden soil is it if so I hope you sterilised it
The plants look fine however I really would put some plastic down and glue it to the bottom frame or create a hardwood floor
I guess it’s in the garden brush yourself off and avoid other plants on the way in
I’d just loathe to see a bunch of bugs attack your crop and you have to resort to spraying them or something
Good luck looks interesting