All earth worms make worm castings. No need for them to be red wigglers. If they are in your soil, you are doing well! With your temperatures that high, I would think you'd have to do your vermicomposting indoors to keep the worms happy. They like cool-ish temperatures and outdoors they will be retreating down into the soil to keep cool at this time of year. So maybe wait until it's winter to try that experiment. It's not something I'd want to be doing inside my house.
I think your soil is already making Humic Acid for you, if you're composting lots of organic materials into it. Just keep amending with the leaves and hay, If you build soil, it will come . .
