Ha, yes! The first year in this place it was good, because the landlord had put in maybe 6-8 inches of potting soil, complete with those crazy styrofoam beads, on top of the clay in-fill (our backyard is paved, and then it has raised planters around in a U shape, maybe two feet tall, with these incredibly annoying evergreen bushes in them). But I had worked through that by the end of the first summer! Since then, it's just been about feeding in enough finished compost to get it going.

I don't just have clay, I also have tons of rocks and chunks of building material in there. It's clear no one ever intended my garden to be fruitful. :)