
Plastic greenhouses are a cost-effective alternative to traditional glass greenhouses, but they can be more difficult to secure. It is important to know how to hold down a plastic greenhouse to prevent it from blowing away or sustaining damage in strong winds. This can be achieved through various methods, such as using spring wire and lock channels, ropes and pegs, or weights and trenches. Additionally, choosing the right type of plastic and installing it properly can help ensure that it stays in place.
| Characteristics | Values |
|---|---|
| Installation | Requires a calm, warm day with no wind |
| Plastic type | Greenhouse plastic with UV stabilizers |
| Plastic thickness | At least 6 mil |
| Installation tools | Spring wire and lock channel, staples and batten board, spring clamps, press clamps, wiggle wire, rope, pegs, straps, weights, concrete slabs, blocks, bricks, lumber, garden stakes |
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What You'll Learn

Use spring wire and lock channel to secure the plastic
Spring wire and lock channel are a great way to secure the plastic on your greenhouse. This method is favoured over staples and batten board as it allows you to remove and reinstall the plastic without causing damage. It is also a very secure way of holding down your plastic greenhouse.
To install the spring wire and lock channel, you will first need to screw the spring lock channel into the baseboards along the bottom of the greenhouse, then over the end walls. The lock channel should fit tightly over the framework and baseboards of the greenhouse.
Next, drape the plastic over the outside of the lock channel. Then, on the inside, use the spring wire to secure the plastic in place. You will need to pull the plastic tight and wiggle the wire back and forth into the channel. Each section of wire is 6.5 feet long, so you will need to cut the wire to size in some places. You can use bolt cutters or a metal saw to do this.
The spring wire and lock channel method is also known as wiggle wire and is a great option for those on a budget. It is made from stainless steel, which makes it strong and durable. It is also easy to use and can withstand wind, rain, snow, and other types of weather.
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Reinforce the base with garden pegs
Reinforcing the base of your plastic greenhouse with garden pegs is a simple yet effective way to ensure its longevity. Garden pegs, also known as grounds pegs or tent pegs, are an inexpensive solution to securing your greenhouse and protecting it from strong winds.
To begin reinforcing the base, you will need to purchase garden pegs if you don't already have some. These can be found at most garden centres or home improvement stores. It is recommended to have one peg per rope, and for a plastic greenhouse, you will typically need four ropes, one for each corner.
Once you have your garden pegs and ropes, follow these steps:
- Position your plastic greenhouse in the desired location, ensuring it is oriented away from prevailing winds.
- Hammer the garden pegs into the ground at a slight angle, ensuring they are secure and sturdy. Space the pegs evenly, corresponding to the four corners of the greenhouse.
- Attach the ropes to the greenhouse, connecting them to the frame or cover loops.
- Secure the ropes to the garden pegs, pulling them taut to create tension. This will help hold the greenhouse firmly in place.
By reinforcing the base with garden pegs and ropes, you are providing a strong anchor for your plastic greenhouse. This simple reinforcement technique can make a significant difference in the stability of your greenhouse, especially during high winds.
For added security, consider using straps that go over the entire structure and tie down to the base or nearby sturdy objects. Additionally, maintaining your greenhouse regularly and checking the tension of the ropes and the security of the pegs will ensure the longevity of your setup.
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Use straps to tie the greenhouse down to a frame or nearby blocks
To hold down a plastic greenhouse, one option is to use straps to tie it down to a frame or nearby blocks. This method can be effective in protecting your greenhouse from strong winds and ensuring its longevity. Here are some detailed steps and tips to guide you through the process:
First, it is important to choose the right straps for the job. Look for straps that are specifically designed for securing structures, such as high-quality straps used for camping or tying down loads on vehicles. These straps should be durable and able to withstand the elements.
Next, you'll want to position the straps securely over the entire structure, including the cover. Ensure that the straps are tightly fastened to the frame of the greenhouse. If your greenhouse doesn't have a frame, you can create one by using a wood foundation or mounting it on wood. This provides a sturdy base for the straps to anchor onto.
When tying down the straps, create a criss-cross pattern across the greenhouse, similar to how you would secure a load on a vehicle. This helps distribute the tension evenly and provides stability. Aim for at least four straps, one for each corner of the greenhouse, but you can always add more for extra security.
Nearby blocks, such as breeze blocks, concrete slabs, or bricks, can also be used as anchors for your straps. If you don't have blocks, you can use weights or anchors that are firmly grounded. Place these weights or anchors at each corner of the greenhouse and secure the straps tightly to them.
Additionally, consider using ground augers or anchors at each corner of the greenhouse. These can be screwed or bolted into the ground, providing a solid and secure foundation. This method is especially useful if you live in an area with high winds or storms.
By following these steps and tips, you can effectively use straps to tie down your plastic greenhouse to a frame or nearby blocks, ensuring its stability and longevity even in challenging weather conditions. Remember to regularly inspect your setup and make adjustments as needed to ensure the continued safety of your greenhouse.
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Bury the plastic in a trench and weigh it down
Burying a plastic greenhouse in a trench is a good way to hold it down and protect it from strong winds. Here is a step-by-step guide on how to do it:
First, dig a trench around the perimeter of the greenhouse. The trench should be deep enough to accommodate a portion of the plastic sheeting and any weights or anchors you plan to use. It is important to choose a suitable location for your greenhouse, considering the wind direction and speed in your area.
Next, place weights or anchors along the trench. You can use various objects as weights, such as rocks, logs, concrete slabs, or garden stakes. These weights will help keep the plastic in place and provide extra stability. Ensure that the weights are secure and will not easily be displaced by wind or other elements.
Then, carefully lay the plastic sheeting into the trench, ensuring that it is taut and smooth. The plastic should be pulled tight and secured properly to prevent any loose areas that could be caught by the wind. It is recommended to use a PVC-coated spring wire, also known as a "wiggle wire," to secure the plastic into a lock channel. This method allows for easy removal and reinstallation without damaging the plastic.
Finally, bury the edges of the plastic sheeting with soil or other materials to hold it in place further. You can also use stakes or garden pegs to pin down the plastic and ensure that it remains secure. Regular maintenance and inspections are crucial to ensuring that your plastic greenhouse setup lasts for several years.
By following these steps and choosing appropriate weights and anchoring methods, you can effectively hold down a plastic greenhouse and protect your plants from harsh weather conditions.
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Use high-quality camping gear ropes
Using high-quality camping gear ropes is an effective way to secure your plastic greenhouse and protect it from strong winds. It is recommended to purchase ropes designed for holding tents in high winds, often referred to as "guy ropes." Look for ropes with good reviews and ensure you have enough to secure each corner of the greenhouse, with the option to double up for added security.
When selecting ropes, opt for those made from durable materials that can withstand the elements, such as those used in all-weather camping gear. These ropes will be able to withstand strong winds, rain, and sun exposure without easily deteriorating. The ropes should be thick enough to provide strength but also easy to handle and tie securely.
To install the ropes, you can utilize garden pegs or tent pegs. Drive the pegs into the ground at each corner of the greenhouse, and then use the ropes to securely fasten the greenhouse to the pegs. Ensure that the ropes are tight and well-knotted to provide maximum stability. You can also consider using straps that go over the entire structure and tie down to the base or nearby sturdy objects for additional security.
In addition to ropes, you may also want to invest in some weights or anchors. Place weights on top of the poles or at the base of the greenhouse to provide extra stability. Popular items used for this purpose include bags of compost, paving slabs, breeze blocks, bricks, or concrete slabs. This added weight helps to prevent the greenhouse from being lifted or blown away in high winds.
By combining high-quality camping gear ropes with weights and secure pegs, you can effectively hold down your plastic greenhouse and protect it from strong winds and other weather conditions. Remember to regularly maintain your ropes and anchoring system to ensure that your plastic greenhouse remains sturdy and secure throughout the years.
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Frequently asked questions
There are several ways to hold down a plastic greenhouse, including:
- Using spring wire and lock channel to secure the plastic without damaging it.
- Burying the edges of the plastic in a trench and weighing down the buried portion with heavy objects.
- Using ropes and garden pegs to secure the frame in place.
- Adding weights to the poles in the centre of the greenhouse, such as bags of compost, paving slabs, or bricks.
It is important to use plastic that is specifically designed for greenhouses, as it contains UV stabilizers that are necessary for the plastic to withstand intense sunlight. Regular plastic sheeting will shred quickly when exposed to sunlight. Greenhouse plastic is also more durable and less likely to need replacement, making it a better long-term investment.
It is best to install greenhouse plastic on a calm, warm day. Warm temperatures are ideal because plastic expands and contracts with temperature changes, so installing it when it is warm will reduce the potential for loose plastic when the weather cools down.
There are several methods for attaching plastic to a greenhouse, including:
- Spring wire and lock channel: This method is simple, economical, and allows for easy removal and reinstallation of the plastic without causing damage.
- Staples and batten board: This method can secure the plastic but may not be as effective in high winds.
- Special clips or clamps: These can be used to secure the plastic without poking holes, but may not be as secure.











































