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How To Keep Polytunnels Warm In Winter

Do Polytunnels Stay Warm In Winter

Keeping your polytunnels warm during the cold winter months is essential for your vegetable garden. It helps ensure that you get the best yields from your crops. In this article, we’ll explore some tips to help you keep your garden warm all season long.


Whether you’re growing kale indoors or in a polytunnel, this winter green offers a protective shelter from harsh weather and pests. It’s also ideal for harvesting all year round. Kale grows well in cool weather, which brings out the sweetness of leafy greens.

Several varieties of kale can be grown indoors. This includes Dwarf Siberian, which offers excellent cold tolerance. It also produces small leaves used in salads in summer.

Kale is also a popular food source for humans and animals. It attracts birds that feed on insects on its leaves. Fledgling sparrows use bolting kale plants as perches. It is also used by pigeons and caterpillars.


Whether you’re planting a garden, or simply have a balcony, polytunnels are a fantastic way to extend your growing season and keep your plants safe from frost and pests. For some people, they are a permanent addition to their garden, providing a cool, dry environment that can store rainwater. They can also be used to protect bare root fruit trees from the elements.

If you’re planning on growing winter cabbages, you may want to prepare a polytunnel to help your plants survive the cold. If you’re using a polytunnel, you will want to be sure to choose one that provides plenty of ventilation. It’s also a good idea to place a row cover over the plants to protect them from frost.


Having a Wasabi plant growing in your garden isn’t the easiest thing to do. It needs a lot of attention, particularly if you’re not in Japan. Its best to grow it in a well-shaded spot, away from tree branches and the sun. It needs a moist and cool environment, with an air temperature of 24 Deg C or less.

The plant is quite hardy, and you can harvest its outer leaves on a regular basis. It is not as vigorous as Mizuna, but its mild flavor makes it a worthwhile addition to salads.

The plant is also known for its anti-inflammatory properties. The seeds are an interesting addition to a salad.


Traditionally watercress is a hardy winter vegetable. But it is also a great addition to salads during the early spring months. It grows well in moist soil and can be grown indoors or outdoors.

The watercress plant is a member of the cabbage family. Like its cousin the wasabi, it grows well in damp soil.

Watercress grows in ponds, rivers and ditches. It can also be grown in a greenhouse or indoors. A warm greenhouse can be a good environment for watercress.

Watercress can be harvested as baby leaves. They can also be dried. This is a good way to add watercress to a variety of baked foods. The dried leaves are still packed with vitamins.


Whether you’re planting in a greenhouse, a polytunnel or in a container, pomegranates are hardy trees that can take a lot of cold. Some pomegranates are even hardy to -15 Co. However, extreme cold winters can damage hardy pomegranates.

Pomegranates should be grown in well-drained soil that is rich in organic matter. The fruits are also rich in antioxidants. The tree should also be mulched with well-rotted manure once a year.

Pomegranates can survive in cooler climates, but they’ll need a little extra warmth to ripen. In the UK, they’re often associated with warm, tropical climates. Depending on the cultivar, they can even grow in unheated polytunnels.


Adding insulation to polytunnels is an important step for protecting your crops from the elements during the winter. This is especially important for plants that are susceptible to cold weather and pests.

One way to improve the insulation of polytunnels is by using frost fabric. This is an inexpensive, low-maintenance solution that can be applied on the floor of the tunnel, providing a little extra warmth.

Another option is to add thermal mass. This can be in the form of bricks, stones, or tile, and will help store heat during the day and release it slowly at night.

Another way to insulate polytunnels is to add a layer of bubble wrap. This can be hung on the polythene cover by string or cable ties, and can help to protect the plants inside from chilly draughts.