I've had a bit of a square foot garden experiment going on in the asparagus bed this year. Five years ago, when I decided I wanted to try growing fresh asparagus spears, I ordered just five little plug plants - it's all about tiny tastes here - and set them out in a five dice shape in a one metre square raised bed. Two of my five crowns have died off in the years since(1) so allocating a whole bed to one small perennial crop has made me think a lot about the waste of good growing space.
