Need to correct something here.
Worms do not eat organic matter that we can see with the naked eye. They eat both bacteria and fungi byproducts (the bacteria and fungi pass through their body while they do it too, so technically they are eating the fungi and bacteria but they aren't really as they come out the other end living).
Worms cannot harm plant roots. They can't "bite" pieces off, and they can't rip the roots by passing by them.
The typical fishing nightcrawler is essentially useless in helping to break down organic matter for plants. There is 1 type worm that has "nightcrawler" in it's name that technically can do this, but the "fishing worms" generally aren't this species.
Don't waste your money on putting fishing worms in your pots. Really, unless you are no till gardening and have really large pots(doing cover crops and the chop'n'drop method for them) it's not really going to do anything for you at all.
If you want to get educated, read up on the following things:
- Soil food web
- vermicomposing
- No Till gardening
Those topics don't have to be specific to cannabis cultivation. These are things used in industrial agriculture and there are TONS of good quality sources out there that give you actual science, not the broscience you seem to be getting on this thread.
Good luck! Keep growing!
