Things To Consider When Choosing Your Polytunnel Site

Polytunnels are a cost-effective and easy-to-build alternative to greenhouses. However, you still need to invest the same amount of time and effort when deciding where to put one. Unlike a greenhouse, it is possible to move a polytunnel if its location doesn't meet expectations. But, let's be honest, it's much better to get it right the first time!

To help you choose the optimal spot for your polytunnel we've put together a list of things to consider. As long as you bear them in mind, you'll pick a prime site and get the best out of your polytunnel.

Sufficient Sunlight

Sunlight is essential for plant growth and ripe produce. It's absolutely critical to the success of your polytunnel that it receives adequate sunlight each day. You need to be mindful of the shadows cast by surrounding buildings and trees. Without direct sunlight, a polytunnel will be of little use to your plants. It's also good to consider how the sun's position changes over the year. While too much shade is a problem, you may want some shade in summer to help prevent the plants overheating.

Exposure to the Elements

While you want your polytunnel to be free from too many shadows, you don't want it to be overexposed to the elements, especially high winds. Polytunnels are very sturdy, but constant exposure to high winds will significantly reduce the lifespan of your cover. Constant wind exposure will also lower the inside temperature of your polytunnel, making it less efficient.

Another weather consideration is frost. Some areas of a garden are often colder than others because of land contours, buildings etc. When this happens, it is called a frost pocket. To maximise your polytunnel's performance, avoid placing it in a frost pocket.

Drainage

Drainage is really important if you plan to grow directly into the soil. Try not to choose a site that can become waterlogged. Too much groundwater can rot the roots of plants, causing mould, and also create a very soft, muddy environment in which to work. It is still possible to build a polytunnel into the ground if there is no alternative. However, you will need to install a French drain and use raised beds for planting.

Access All Areas

When positioning your polytunnel to ensure you have access to the full perimeter. You need to be able to walk around the polytunnel to inspect it on a regular basis and also to clean it. Try not to place your polytunnel close to trees and bushes. Sharp and overhanging branches can cause wear and tear as well as rips. You might also find debris gathering on the polytunnel, which will reduce its performance and increase the need for cleaning. The same applies if you place your polytunnel where birds regularly gather. You'll constantly be cleaning the exterior!

Utilities

Depending on your polytunnel set up you may need access to water and electricity, either now or in the future. Positioning your polytunnel close to utilities or in a spot where you can extend the utilities could help save time and money in the future.