I pushed the harvesting until November. My reading said October for leeks. Our weather has been mild, so I gave it a try. I planted a four foot row. I didn't know what I was doing, and didn't thin them. You are suppose to build sand up around the bottom, to keep them white. I didn't do that either, since I am a lazy gardener.
This defiantly was a labor of love. I love leek soup, but I don't think I will be growing or harvesting leeks again. There's the twice trimming while growing, the picking, more trimming, washing and more washing. Then I laid them on trays to be placed into the freezer, so they wouldn't stick together. When they were frozen, I tucked small bunches into freezer bags, and refroze.
If anyone has a good potato and leek soup recipe, they'd like to pass along, please let me know.