Yesterday, I dug up the two dahlias. I had planted four originally, but two of them never grew despite the tubers have nice eyes. We had one hard frost a couple of days ago, so I hope they will be alright. I will store them in semi-moist peat moss in the basement.
The plot is ready for winter. Only the Swiss chard is still growing (much of it surprisingly undamaged by the frost), as are leeks, onions and winter greens. I will overwinter the onions and some of the leeks. The garlic is covered with a nice big layer of field hay and should be good until spring.