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What Are the Disadvantages of Polytunnels?

What Are The Disadvantages Of Polytunnels

Whether you are looking to grow vegetables or herbs, you might be wondering what are the disadvantages of polytunnels. Polytunnels are often used to grow crops such as strawberries, tomatoes, peppers, and herbs. The benefits of using a polytunnel include the ability to grow plants in cooler climates. They are also a cost-effective way to grow a variety of plants.

Herbs grown in a polytunnel

Whether you want to grow herbs for culinary use or simply want to have an easy-to-maintain garden, you can do so in a polytunnel. You can grow a variety of herbs, including dill, parsley, basil, tarragon, lemon balm and more.

Herbs are easy to grow. However, they do require different fertilization and irrigation methods than vegetables. For example, you must ensure that the pH level of the solution is balanced. If the pH level is too high, the plant may suffer from iron deficiency. In addition, too much fertilizer may cause extreme growth of fast-growing species.

A good rule of thumb is to keep the path between the plants at a two-foot-wide width. This allows easy access to the plants and prevents trampled leaves.

You can also use a misting system to ensure a steady supply of moisture to the plants. This is especially helpful during the initial stages of growth. If you don’t have a misting system, you can also use an automatic drip hose to provide a steady supply of water to the plants.

Resistance to ultraviolet light

Using ultraviolet light to determine the UV resistance of a plastic material involves a number of factors. In particular, thickness is a significant factor. Materials with a thickness over 30 mil are typically recommended for long term UV resistance. In addition, the opacity of the material is also a major factor.

There are a number of different materials that offer varying degrees of UV resistance. This is important, because plastics are susceptible to damage from ultraviolet light. A material’s UV resistance can determine its lifespan and quality. However, the best choice of yarn or plastic fiber is dependent on the desired application.

The sun’s UV rays break the chemical bonds in a polymer, which causes a deterioration in its properties. Photodegradation can lead to brittleness, chalking, discoloration, and even loss of impact and tensile strength. It can also contribute to elongation.

The most important factor in UV resistance is the material’s thickness. Thicker materials will allow surface UV degradation, but they will retain their strength inside the core material.


Having the advantage of a longer growing season, polytunnels have become a viable option for the food and farming sector. They have also proved to be a credible alternative to traditional livestock buildings. However, there are some planning considerations that must be taken into account when planning for a polytunnel.

During the planning process, applicants will need to demonstrate that their polytunnel will have a direct and positive impact on the local community. In addition, the cumulative effect of developments will also be considered. For instance, if a number of polytunnels are being used on contiguous farms, the local planning authority will encourage a whole farm approach.

Whether or not a polytunnel can be considered cost-effective depends on the size, quality, and number of features the tunnel includes. For instance, a well-made polytunnel will protect crops, and provide reasonable working conditions. Having a gutter system to collect rainwater is also a useful feature.

Easier to grow in cooler climates

Whether you’re a vegetable grower or a flower grower, polytunnels can help you to extend your growing season. They can provide more humid conditions, higher temperatures and protect your crop from damaging wind and hailstones. Besides, they can also help you to control all the different factors that affect your crop.

Polytunnels are very useful for growing cold climate crops during the winter. They can also protect your crops from harsh light. Besides, they can be adapted to provide the right environment for your chosen plant varieties.

If you’re trying to grow your vegetables on a budget, polytunnels are your best bet. They cost less than a greenhouse and last up to 15 years. In addition, they can also be used to grow exotic plants.

For instance, if you live in a mild climate, you can start early spring sowings in a polytunnel. If you live in a cooler climate, you can sow in the early fall.