A:

You can start chitting your early and maincrop seed potatoes in February, but the best time to plant is in early to mid spring. As for growing vegetables in your polytunnels, you have lots of options. Spinach, kale, and some varieties of lettuce will live through the winter in a polytunnel. Certain kinds of onion work well from an autumn sowing, and you'll get a much earlier crop than if you'd waited until spring. Other possibilities are cabbage, Pak Choy, Chinese cabbage, and most root crops. Leeks, beets, carrots, turnips, parsnips and radishes, can be sown for winter harvest