Connect with us


How to Keep Your Polytunnel Warm in Winter

Polytunnel Winter Temperature

Keeping your polytunnel warm during the winter is a huge issue for many gardeners. There are several things that you can do to keep it warm. Some of these things include shading the polytunnel, allowing enough ventilation, and installing insulation.

Sizes of polytunnels

Choosing the best size of polytunnels is an important decision for your gardening needs. Polytunnels are perfect for protecting plants from the elements, extending the growing season and increasing your crop output. These versatile structures can be built to accommodate two rows of raised beds or a single row.

The first thing you should consider is how much space you need. If you have a limited amount of space, you may want to start with a smaller polytunnel. This is important if you plan to grow tender plants like tomatoes or melons.

You should also consider how you plan to use the polytunnel. If you plan to grow tomatoes, you should add organic matter to the soil before planting. This will help keep the soil moist.

Another consideration is whether or not you need planning permission. If you don’t, a polytunnel may not be allowed on your allotment. If you do, you should check with your local council office.


Having top notch ventilation for your polytunnel is essential to your success in the garden. Without proper ventilation, your plants could suffer from stress and problems. Not only will the plants be unable to grow, but they can also be prone to pests and diseases.

It is also important to have proper ventilation for your polytunnel during the winter months. While it is not necessary to have artificial room heaters during the colder months, it is important to keep the tunnel warm enough to help your plants thrive. Using a thermometer is a good way to measure the temperatures in your polytunnel.

Having a proper ventilation system will also help to keep your plants cooler during the hot summer months. The temperature inside a polytunnel is largely dependent on the amount of sunlight, the amount of water absorbed by the plants, and the amount of carbon dioxide in the air.


Using a shading polytunnel in winter can be a good way to grow out-of-season plants. The benefits of using a polytunnel are many, from the ability to grow exotic plants to the ability to protect your crops from harsh weather. In order to keep your crops healthy, it’s important to ensure that you have an adequate ventilation system. This will prevent your plants from overheating. It will also help prevent humidity.

The temperature inside a polytunnel can vary dramatically during the night. If your polytunnel isn’t well insulated, your plants might not survive the cold. Adding some insulation to the doors, windows, or panes can help to keep the temperature inside your polytunnel stable. You may also want to consider installing some type of heating system to keep your plants warm.


Keeping your plants in your polytunnel healthy in winter is essential, especially for those plants that need additional heat. In order to keep your crops warm in the winter, you may need to apply some insulation techniques.

Infrared radiation cannot pass through polythene, so you will need some form of insulation. Bubble wrap is a good option for this purpose. You can use this to insulate the cover of your polytunnel and keep out cold and icy draughts. You can fasten the wrap with string or cable ties.

Another option is to use a polythene cloche to keep out the cold and protect your plants. This is a portable structure that allows you to keep your polytunnel warm and dry without spending a fortune. It is also a great double glazing option.

Plants to grow in a polytunnel in winter

Whether you’re growing vegetables or herbs, a polytunnel can help protect them from the elements. Polytunnels are cheaper than greenhouses and can help extend the growing season. Using a polytunnel can also help protect your bare-root fruit trees.

If you’re planning on growing a vegetable in a polytunnel in winter, choose a variety that’s easy to grow. Radish and turnips are two good varieties. They’re easy to grow, produce a nice harvest, and can be harvested in winter.

The hardy varieties of spring onion are also great for growing in a polytunnel. They’re not as fast as radishes, but they’ll produce a good crop in eight weeks. You can also plant them as a filler crop.

Runner beans are another good choice for growing in a polytunnel. The varieties from Central America grow well and are juicy. You can also plant them in large containers. You’ll need to provide adequate light and ventilation.