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Polytunnel Temperature Control

Polytunnel Temperature Control

The Polytunnel Temperature Control is one of the key issues in polytunnel growing. Global temperatures are forecast to rise over the next few years, which is problematic for growing crops. The key to polytunnel temperature control is choosing plants that require less water. These include tall or vining plants that can provide shade and reduce the need for irrigation. In addition to temperature control, you will also need to think about cost when determining which system is right for you.


Ventilation is a key element of polytunnel temperature control, as it helps the plants thrive and prevents diseases. There are several types of ventilation available, and each type is suited for different plants and climates. The correct ventilation can help improve crop growth, as it promotes good air circulation, which reduces the likelihood of bacterial and fungal infections.

The most common method is door ventilation. However, this method does not work very well unless there are two doors. Another problem with door ventilation is that it takes time and may also allow pests to enter.


The temperature in a polytunnel can vary dramatically. However, using the correct insulation will help to keep it at a comfortable temperature for your plants. One of the best ways to achieve this is by using bubble wrap between the polythene cover and the hoops. You can tie the bubble wrap in place using a cable tie or a piece of string. Ideally, bubble wrap should be UV stabilized to help it resist the sun’s harmful UV rays.

There are different types of polythene covering available to meet different requirements. The type of polythene covering that you use will influence how long it will last. The cheapest ones will need to be replaced after around five years, but better quality covers will last as long as 10 years.

Plant protection

Polytunnels create a microclimate, protecting your plants from the elements. They extend your growing season and prevent damage from frost and freezing weather. This makes them ideal for growing out-of-season plants all year round. They can also be heated to keep plants warm in colder weather. Depending on the climate in your area, your plants will need different temperatures to stay healthy.

In addition to the temperature of the polytunnel, it should also have proper ventilation. This is important to reduce excess heat in the polytunnel and regulate humidity. Plants need ventilation because they are constantly losing water through transpiration. Insufficient ventilation can cause excessive water retention, which can cause diseases and parasites. It can also lead to the death of your plants.


Temperature control is an essential part of polytunnel gardening. The ability to control the temperature inside will ensure that your plants grow properly. They will also protect your crops from intense heat, bright sunlight, cold waves and winds. This technology is commonly used by market gardeners to extend their growing season. For example, some cold-hardy crops may overwinter in a polytunnel, allowing you to harvest your produce later in the season. If you have cold climates in your area, you may want to invest in a polytunnel to produce crops that grow well during the colder months of the year.

A polytunnel is a greenhouse-like structure with a framed metal or plastic structure. They come in different shapes and sizes, each designed to grow different types of vegetation. Because they are climate controlled, they allow you to grow crops that would not otherwise grow well in your region. In addition, they offer protection from animals and pests.


Temperature control in polytunnels is an important part of plant care. Polytunnels reach high temperatures during sunny days, which can damage plants quickly. Therefore, they must be well ventilated and maintained at a nice, even temperature. In addition, the polytunnel should not be too humid as this will foster the growth of harmful insects and diseases. Also, watering must be done in a controlled manner to avoid overwatering.

The ideal temperature for most plants grown in polytunnels is around 26-30 degrees Celsius. However, during hot summers, the temperature can rise above that level and result in a variety of problems, including slow germination, increased risks of disease and pest infestation, and problems with photosynthesis. Overheating can even lead to plant death, so it’s essential to monitor the temperature of your polytunnel on a regular basis.

Keeping plants alive in winter

Polytunnels are an excellent way to protect your crops from the harsh winter weather and prolong their growing season. They are able to withstand even the worst winter conditions and keep most common winter crops frost-free. By installing a polytunnel in your garden, you can extend your growing season and grow your favourite crops in the winter months.

A polytunnel’s windows and doors should be insulated to keep the heat in. If you live in an area where the temperature is always below freezing, you may want to consider an additional heating system for your polytunnel. A polytunnel heater will help you to keep your plants warm while preventing overheating. You can also use a thermometer to monitor the temperature of the polytunnel.

Pest protection

Polytunnels are an excellent way to protect your crops from pests. Although they are not 100% pest-proof, they can help prevent the spread of certain diseases and aphids. The key is to ensure that your polytunnel is kept at a constant temperature and is properly ventilated. You also need to remember that a hot or humid environment is a perfect breeding ground for diseases and pests. In addition, it is essential not to over-water your polytunnel.

Polytunnels can be used to grow a variety of different crops. Cucumbers and artichokes are two plants that grow well in them. Rosemary and oregano can also be planted in polytunnels, as they are good at retaining moisture. Herbs also help to repel pests and help protect crops around them.