Now that I had these great raised garden beds, I wanted a way to fill them as cheaply as possible. Part of this is just because we wanted to save some money and the rest was that our car couldn’t fit many bags of soil so we were trying to save some trips back and forth from the store. I found this link about how to fill raised beds with other stuff besides just regular garden soil (which is what we got for the rest, the type made for vegetable gardens).
materials for the very bottom layer of the raised beds.
We shopped around to find the best (current) price which I believe was $6/bag.