We get organic soil custom made from a local nursery. Custom made? Mixed I guess. We require a certain PH level and certain types of nutrients and compost. They mix it up for us and we run some tests before they deliver. They have always been awesome to work with!
The secret ingredient? Mushroom compost.
It helps with lots of things but here in West Virginia we have lots of clay that doesn’t drain very well so one benefit is that the mushroom compost helps create a loom soil that has great drainage.
You can learn more about why it’s so awesome here.