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How Much Warmer Is A Polytunnel In Winter?

How Much Warmer Is A Polytunnel

When it comes to gardening, you may be wondering: how much warmer is a polytunnel in winter? There are many factors to consider, from size and cost to insulation and access. This article will give you some tips to help you make the right choice for your needs.


There are a few methods for insulating a polytunnel. One option is to use straw mulch, which is a natural thermal insulator. Straw mulch is spread evenly over the ground inside the greenhouse and helps to maintain a warm temperature on cold days and a cool one on hot ones. However, straw mulch is not suitable for all crops and you must check whether it will have any harmful effects on your crops before using it. Straw mulch is commonly available in rural areas and is an economical solution.

Another way to keep the polytunnel warm is by using bubble wrap. It’s a cheap and effective way to keep out cold draughts and retain heat within the plant area. If you can’t afford to use bubble wrap, you can also consider using mini-cloches to cover plants. This will also help keep out any drafts that can enter the tunnel.


When you’re growing plants in a polytunnel, it’s important to remember that they thrive in a temperature between 26 and 30 degrees Celsius. However, these temperatures can easily climb higher than this on very sunny days, and too much heat can slow down germination, cause pest and disease problems, or even kill plants.

A polytunnel is a great option for growing vegetables. These vegetables require less heat than their counterparts in the greenhouse, and can be planted throughout the winter and early spring. The soil volume in a polytunnel is considerably larger than in a greenhouse, which means you can increase your production. Plus, a polytunnel’s temperature and humidity will be more stable, making it a better choice for growing fruits and vegetables.


A polytunnel can be used for many purposes and comes in a variety of sizes. The smallest sizes are ideal for smaller allotments and gardens, while larger ones can cost up to PS1,000. The more expensive varieties are better suited for commercial gardeners. The cost of a polytunnel will depend on the size of the tunnel and its construction.

A polytunnel can be either domestic or commercial. A domestic polytunnel is usually used by home gardeners to extend their gardening season into winter and protect their plants from the British weather. A commercial polytunnel is usually used for food production.


Polytunnels are fantastic for growing plants in as they create a micro-climate that will help to extend the growing season. These structures can also help to protect plants from extreme weather conditions, making them a popular choice for those who want to grow plants all year round. Polytunnels can be heated in winter to give plants the heat they need to grow. The temperatures within a polytunnel should be kept at an average of twenty-five degrees. However, if the temperature is too hot, the plants will suffer from photosynthesis problems and will be less productive.

Polytunnels can be made of wood, steel or aluminum. Wood is a good choice because it is durable and does not corrode. Plastic frames are cheaper but may not withstand the harsh weather as well. Plastic frames can also break more easily, so it may be necessary to replace or repair them. Wooden polytunnels also allow for better air circulation, and they can withstand years of use.

Crops that grow well in a polytunnel

A polytunnel is a great space to grow crops in. There are plenty of vegetable crops that do well in the space, but you should choose crops that are suitable for your polytunnel. Tomatoes, for example, are small plants that need a warm climate. A polytunnel can help protect tomatoes from the elements and keep the soil warm.

One crop that grows very well in a polytunneL is garlic. If you plant it inside in October, it will sprout quickly and grow through the winter. This means that you can harvest the garlic later than you would outside. Moreover, you’ll get bigger bulbs than you would otherwise grow. On average, a single bulb will grow about one-third larger in a polytunnel than in the ground.


Proper ventilation in a polytunnel will keep the space cool and reduce the risk of plant diseases. This is important as high humidity is conducive to mould and mildew growth, both of which can spread disease. Ventilation can be provided through doors or windows. The best way to choose the right ventilation is to consider your own specific needs and preferences. In this article, we will discuss the factors that you should consider when determining the ventilation requirements for your polytunnel.

First, you should consider your site’s climate. A site that is exposed to wind can cause your polytunnel to have poor ventilation. However, if the site is calm, side ventilation can be beneficial. In these cases, installing a polythene blind on the outside can help. It will enable you to control the ventilation.