Winter Harvesting and Over-Wintering Crops for your Polytunnel

For many of us polytunnel enthusiasts to grow all year round is one of the most important reasons to have a polytunnel in the first place. Here are some suggestions for Winter-harvesting and Over-wintering crops for the polytunnel

WINTER-HARVESTING
Crop When to sow When to harvest
Winter Lettuce August to September Winter
Oriental Greens August to September from October (Cut ‘n come again)
Salad Rocket September November
Winter Purslane August to November all Winter (Cut ‘n come again)
Spinach, annual July to October August to December
Spinach, perpetual, July/ August October/November chard, leaf beet
Scallions July to September all through the Winter

OVER-WINTERING
Crop When to sow When to harvest
Mangetout/Sweet Pea September March
Broad beans October/November May
Purple sprouting broccoli August From March
Calabrese August/September May
Onions (Winter types) September/October May/June (from sets)
Garlic (Autumn types) November June/July (from cloves)
Early potatoes February May
Carrots (early variety) February/March May/June

Hans Wieland, August 2020