Ways to prevent pests in Greenhouses and Polytunnels
- Keep your space clean – it is worth thoroughly emptying and cleaning out your greenhouse or polytunnel once a year. This involves washing down the windows, hosing off the floors and cleansing all the pots
- Inspect your Plants – It is important to check over all your plants before they enter the greenhouse or polytunnel in order to prevent pests spreading inside. Bugs love the warmth and they multiply in the heat.
- Disinfect your tools – Most gardeners will use the same tools all around the garden which means they can pick up pests from the soil outside. It is worth giving spades, trowels and other tools a good clean in soapy water every now and then
- Use insect catchers – Insects will always find a way into your greenhouse or polytunnel so try and catch them where they fly. JFH supply a Greenhouse Fly Catcher which controls whitefly, blackfly and other pests
- Use netting – Greenhouses and polytunnels need good ventilation and shouldn’t be sealed up completely to stop pests. To cut down on the number of flying pests, why not hang netting across open windows or other vent points
- Use potting soil – Often regular soil from the garden will be packed full of bugs, so for plants in the greenhouse or polytunnel, it’s a good idea to pot them in bought potting soil or compost. This should be sterilised as well as being rich in nutrients to help the plants grow
- Rotate Crops - If you plant directly into the ground inside your greenhouse or polytunnel, you won’t have as much control over the spread of potential pests within that soil. A method of combatting this is crop rotation – each year vary what type of plant you are growing in that piece of ground. This tends to prevent the build-up of pests in the soil
- Freeze the pests – This is an extreme measure that you could perform once a year if you believe your greenhouse or polytunnel is truly infested. During the winter, allow it to enter a chilling period by opening up all the doors and windows for a couple of days. The temperature will drop killing off any pests including their eggs and larvae. As long as it not cold for too long the plants should survive this
- Use biological pest control - Many common greenhouse or polytunnel pests can be fought with biological control. JFH offer a selection to purchase including a full range of Doff products
Hopefully by putting these tips into practice, your greenhouse or polytunnel will remain pest-free and your plants will thrive all year round.
For more information or advice on how to prevent pest control, speak to one of our Sales Team on 01270 212726.