As i understand it, the most acrive soils in terms of their microbial count, are found on forrest floors. So why not visit y9ur local forest, fill a bag with that soft black microbe rich soil y9u will fine under the leaf litter, and their you go! Perfect for your compost tea brew.
PS I should add you need an estab,ished forrest with good variety of trees. Pine plantations or such will not be as useful by far.
I learned this from Tim Wilson (aka Microbeman) so it’s not my own wisdom; but forests are typically fungally dominated and they usually won’t have the right kind, much less species, of mycorrhizal fungi you want for cannabis - glomus intraradicies. Cannabis likes bacterially dominated soil. Specifically the soil found in grasslands. So, a good compost or EWC or a compost stimulator is a better starter.
@hecno is a wealth of knowledge, so listen to his advice. I highly suggest you go read Tim Wilson’s website on compost tea. He is one of the great authorities on compost teas, besides Dr Ingham. Here’s a link:
http://microbeorganics.com/
Earthworms...I’m not feeding mine table scraps much. If you want a racehorse, you feed it like a racehorse. Mine get malted barley that I grind up in a coffee grinder. Very cheap at your local home brew store. ANY malted (sprouted) grain will do. I give them horse manure that’s aged a bit (easy to get free from most any stable) and some good quality compost. They also get neem and Karanja meal regularly and will be getting comfrey this year, if what I planted does well. All cheaply obtained but will produce high quality castings - better than any store bought or even table scrap fed. For the urban home that wants to raise some worms, I’d get this:
https://urbanwormcompany.com/
If you’re interested in this stuff, listen to the KIS Organics podcast series but for your interest in worms and growing I’d start with the Coot interview! Tad, the interviewer, is the son of some of the original compost brewing explorers and had a huge part in getting us where we are today:
I’m sure hecno will have some better suggestions but here are some ways to find some premium inputs locally....
1. As around and look online if there’s an organic gardening supply or perhaps a local organic gardening club. There may be one around you that could point you to some high quality compost.
2. Ask around about local worm farms. If there is any freshwater fishing in your area, there will probably be a local source for live worms for fisherman. Trace the source from a local vendor and ask the farmer if you can buy some castings from his beds. There are lots of worm farmers over here that don’t realize they can dig more value out of their beds than the actual worms.
3. Look around for a local organic dairy or a high-end horse stable or farm. They may have some compost you can sweet talk them out of or allow you to have/buy some manure to start composting yourself or feed to your future worms.
Listen to hecno but hopefully this will help some and maybe he’ll agree with some of it.