An Aid in Cultivation


 Garden and commercial polytunnels have aided in how we can now produce fruits, vegetables, plants, and flowers. In very large and small garden polytunnels, these effective structures are not just about extending the growing season; they also provide a significantly protective and flourishing environment, enhancing productivity and sustainability, providing a controlled environment that can yield substantial amounts of fresh produce inside commercial polytunnels

 

Commercial and Garden Polytunnels in Agricultural or Horticultural Settings

For commercial growers and farmers, commercial polytunnels are game-changers. They enable the space for vast amounts of fresh produce, particularly in climates less than ideal for year-round growing conditions. In the UK for example, around 80% of soft fruits sold in retail are grown in these versatile housings.

 

How Polytunnels Work

Most professional commercial and garden polytunnels are constructed using a framework of steel tubes covered with a transparent grade of polythene sheet. Available in effective design shapes, that trap heat and raise the temperature inside the tunnel, creating a micro-climate, greenhouse effect. The soil warms up quicker when under these shelters than it would, in an open environment, encouraging faster plant growth. Additionally, the polythene cover diffuses sunlight, reducing the risk of sunburn on delicate plants while providing ample light and heat for photosynthesis and warmth.

To optimise conditions inside commercial or garden polytunnels additional measures can be added, such as ventilation and shading are often employed. This helps maintain a balanced temperature, that prevents burning and overheating, which can be detrimental to certain crops, carefully controlling these factors means gardeners and farmers can look at cultivating a wider range of plants that may otherwise struggle in the open-air locations around the UK.

For those growers interested in growing fruits, polytunnels are perfect for tomatoes, strawberries, raspberries, and other soft fruits. Fruits often require protection from cold blustery weather and high wind or lashing rain, which can damage crops and reduce yield. The controlled environment of a polytunnel not only shields them from the elements but also provides the warmth they need to ripen fully.

Both garden and commercial polytunnels are a boon for flower and plant enthusiasts. Many flowers grown from seed require specific temperatures and humid conditions and can be successfully grown under a protective covering, extending their blooming period and enhancing healthy growth in colour and fragrance.

 

What Not to Grow

While polytunnels are incredibly versatile, some plants are not suited to this environment and prefer to be out in the open. Many plants that prefer cooler conditions or require a lot of air circulation might struggle in warmer, more humid conditions of small garden polytunnels. Root crops like garlic and onions, which prefer dry conditions, may also not do as well, so always check what types of veg and plants like being grown in outdoor conditions

Additionally, it's essential to consider the space and finishing size of the plants you wish to grow. Fruit trees, plants and crops that grow taller than the known height of the polytunnel should be planted out when sturdy or avoided, as they could damage the covering. Similarly, any plants with thorns or sharp edges may cause a puncture or tear in the polythene cover, leading to costly repairs.

In both garden and commercial polytunnels, crop rotation is crucial. This practice involves changing the types of crops grown in each section of the tunnel and each season to prevent soil nutrient depletion and to help reduce the risk of disease. By rotating crops, you ensure that your soil remains healthy and fertile.

In conclusion, small garden polytunnels and their much larger single and multi-span commercial polytunnels, are invaluable tools for both commercial growers, farmers, allotments, niche producers, and home gardeners. 




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