Update: I tended to my first bed, looking forward to spring. When I dug into the soil (which was really, really rich), I uncovered wiggly termites. In the time it took me to run to the house screeching, the termites had disappeared. He didn't say so, but I'm fairly sure DH thought I was crazy. I was determined to find them again
Our house is up on a limestone outcropping that is "honeycombed" with pockets. I dug and dug around, but couldn't prove they had been there. Two days later, I noticed a few holes in the siding on the front of the little greenhouse that abuts our limestone house. I pulled at the siding and found the same creeping crawlers directly across from my garden bed. We had to spray the GH and the garden bed, and take off the siding. I decided I couldn't grow vegetables in that spot. I further decided I couldn't grow vegetables!
I'm sticking to flowers!