It’s almost mid-summer so time to think about winter planting. There are two ways to ensure you have fresh veg over winter: choose crops that grow in the summer and stay in the ground over winter or sow seeds in late summer of plants that can be harvested through the winter. Most veg growers do both.
The main thing about deciding how to get a year-round harvest is where you live. In the south and south west the winters are generally milder than in the north. That is not always the case and with the changes to the climate over the last 30 years it is hard to predict how the winter will be. Choose the varieties that suit your location. Ask other local gardeners what they do.
The other thing you can do is protect your crops, that means covering them. Don’t be fooled by the idea that you can use a cheap fleece ‘blanket’, and everything will be fine. Fleece might stop ice crystals forming on the foliage which could help them to survive, but it will not insulate the crop from the cold.
The 3 solar pods made last year. The beds are 2m x 1m with a centre divider. The pods are 1m square so can be used on any bed. The long bed on the right has been divided into 4, 1msquare beds.
To keep out the cold you need something substantial like, a poly tunnel, a cold frame or a DIY solar pod. It is possible to be harvesting lettuce from January – March if you protect the crop and get the right seeds. One year we had lettuce in a polytunnel that were completely covered in ice. It thawed and we ate them! Or if you are really dedicated you can make hot beds which uses the heat from manure buried under the soil to keep things warm. It does work but is a lot of work. See how to make hotbeds here.
Hot bed with insulated walls.
The practical approach is to choose plant varieties that will thrive through winter and use some physical protection if you can.
Things we don’t sow try to over winter: garlic, we use a short dormancy variety with cloves planted in January when the weather is suitable. Neither do we sow broad beans in the autumn. Our garden is 300m ASL so winter can be long cold and very wet! If you live further south it is always worth trying to over winter as many crops as you can.
Another option is to move the plants out of the garden. A greenhouse is fine if you have one but a good supply of salad leaves can be grown on a sunny windowsill. Our salad crops are grown in trays on the lettuce table which can be moved into the greenhouse. Watercress will be in a smaller tray and again will over winter in the greenhouse. You can also grow in containers that can be moved inside when it gets colder.
Red lettuce in a bucket.
Don’t forget to make holes in the bottom. Fill with bagged compost – not garden soil as it is too dense for small containers. You can grow a lot of food in containers, see this site.
These are some varieties we have like.
Lettuce: Winter Density and Winter Gem.
Spinach: Perpetual also known as Spinach Beet.
Carrot: Bolero, Eskimo F1, a new variety we are trying this year.
Kale: Cavolo Nero because the curly green variety is everywhere now.
Parsnip: most varieties will sit in the ground for months, we like Tender & True.
Leeks: Musselburgh, they can stay in the ground to February/March.
Potatoes are lifted and stored in hessian sacks and can last into March.
Onions are harvested, dried and stored in net sacks.
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