How Do You Hold A Greenhouse Down? (Better Alternative)

Greenhouses are a great way to extend your growing season and add to the productivity of your garden. 

They help you protect plants from weather, pests and disease, while letting in just enough sunlight to keep them healthy. 

But they need some extra attention! Greenhouses can be heavy and hard to move around once they’re built. 

So it’s important that you do everything possible to ensure that your greenhouse base is well-built so it doesn’t fall over on you!

Protecting the Greenhouse from Wind & Cold – YouTube
Building a secure foundation for your greenhouse is crucial for its stability.
Consider using concrete footings or ground anchors to hold your greenhouse down.
Installing windbreaks or creating a sheltered location can help protect your greenhouse from strong winds.
Exploring alternative options such as using weighted barrels or sandbags can provide additional stability.
Regularly inspect your greenhouse for any signs of damage or weak points that may compromise its stability.

Use Plywood

Plywood is a great material for the base of your greenhouse. It’s easy to cut, and you can buy it in different thicknesses. 

This means that you can use plywood for the foundation or for shelves inside the greenhouse. 

Plywood is also a good choice if you’re building a temporary greenhouse; it’s sturdy enough that it won’t fall apart if you move from one place to another, but its thin profile makes it easy to disassemble when you’re ready to pack up and go home.

When it comes to reinforcing your canopy top, it’s important to use the right techniques and materials. Our comprehensive guide on reinforcing a canopy top provides easy tips and step-by-step instructions to ensure your canopy stays secure and durable.

Use Concrete Blocks

You can use concrete blocks to hold down your greenhouse. The blocks should be at least 24 inches wide, 12 inches deep and 12 inches high. 

To ensure stability, make sure that the blocks are level and spaced apart no more than 8 inches.

Build a Base of Pressure-Treated Wood

The base of your greenhouse is the support structure that holds up the roof. To ensure your greenhouse’s stability, this part needs to be built with pressure-treated wood. 

Pressure-treated wood is designed to last for many years in a wet environment and can withstand rot or decay from insects or fungi. 

You’ll need to use 2x4s cut into lengths of four feet, as well as a 4×4 post for each corner of the greenhouse. 

For extra strength, you may also want to add another horizontal beam across each corner post (like what’s seen in traditional barn construction). 

Finally, you should also include one vertical beam running down from each side wall at about three feet high—this will provide additional support for any shelving or plants placed on top!

Build a Foundation Before Building Your Greenhouse

Building a greenhouse can be quite the project. Before you begin, though, it’s important to make sure that your greenhouse is properly supported and secured. This includes preparing the foundation of your greenhouse.

The foundation of a greenhouse is its base; it’s what keeps everything in place. There are two main types: concrete blocks or wooden planks. 

A concrete block foundation requires more materials but is sturdier, while the wood option allows for greater customization and flexibility in design but requires less work overall (you can use existing boards if they’re available). 

Wind can pose a significant challenge to the stability of your greenhouse. Discover effective methods and strategies to secure your greenhouse from the wind in our informative guide, ensuring the protection of your plants and the longevity of your structure.

Ground Anchors

To secure your greenhouse, you’ll need to install ground anchors around the perimeter of your greenhouse. 

These anchors should be placed at least 1 foot into the ground and spaced at least 3 feet apart. Make sure they’re installed level and firmly in the ground so they don’t become loose over time.

If you have questions about how to properly install a greenhouse, feel free to contact us!

Use Cement for Heavier Structures

If you have a bigger greenhouse, such as a hothouse or cold frame, then it’s likely that you’ll need to build a base for it.

One of the best materials for this is cement. Cement is strong, durable and water-resistant so it will last longer than any other material – but there are some drawbacks too. 

First off: cement is heavy which means that if your greenhouse has no roof and isn’t supported by anything else (e.g., trees) then it may fall over in high winds or heavy snowfall if there’s no base underneath it! 

Secondly: because cement doesn’t bend like wood does when wet or dry seasons come around; therefore, they crack over time due to expansion/contraction issues caused by changing temperatures throughout different seasons/years.

Reinforcement MethodDescription
Cement SlabUse a cement slab as the foundation for your greenhouse to provide a strong and stable base, especially suitable for heavier structures.
Sonotube FootingsInstall sonotube footings filled with cement to create sturdy support for the corners and center points of your greenhouse, ensuring stability.
Concrete Block FoundationBuild a concrete block foundation for your greenhouse, offering a solid base that can handle the weight of larger or heavier greenhouse structures.
Structural Concrete PiersUtilize structural concrete piers to support and reinforce the load-bearing points of your greenhouse, providing enhanced stability and durability.
Reinforced Concrete FootingsConstruct reinforced concrete footings beneath the perimeter of your greenhouse to distribute the weight and strengthen the foundation.

Dead Men

One option is to use dead men. These are metal or concrete blocks that fasten to the foundation and extend up into your greenhouse. 

If there’s a high wind, these blocks will be pulled out, which means they will hold down your greenhouse. You can install these yourself, but it’s always safer to hire someone who knows how to do it right.

Before you buy anything, check with your local building department to see if they have any regulations on how many dead men you need and where they should go. 

Also make sure that whatever materials you use are strong enough for their purpose; regular concrete blocks might not be able to hold down a heavy greenhouse in extreme weather conditions!

Maintaining the ideal temperature inside your greenhouse is essential for the health and productivity of your plants. Explore our expert advice on keeping your greenhouse warm to discover easy and efficient ways to create a comfortable environment for optimal growth.

Drive Wooden Stakes in the Ground Inside your Greenhouse

To keep your greenhouse in place, drive wooden stakes into the ground inside your greenhouse.

 Use a mallet and hammer to pound wooden stakes into the ground at an angle, so the top of each stake faces inward. 

Tie down your greenhouse with these stakes, making sure they’re deep enough to hold it down if you get strong winds or other extreme weather conditions.

Reinforcement MethodDescription
Wooden StakesDrive wooden stakes into the ground inside your greenhouse to provide additional anchoring and stability to the structure.
Steel Anchoring SystemUse a steel anchoring system, such as the GardenMaster Ground Anchor Kit, to secure your greenhouse firmly to the ground, ensuring resistance against shifting and external forces.
Screw-in Earth AnchorsInstall screw-in earth anchors, such as the Auger-Style Earth Anchors, into the ground inside your greenhouse for reliable reinforcement and improved stability.
Concrete PiersCreate concrete piers by pouring concrete into pre-dug holes inside your greenhouse, offering a solid and secure base for the structure.
Ground-Embedded BracketsUtilize ground-embedded brackets, like the EZ-Connect Greenhouse Anchor Kit, to fasten the greenhouse frame to the ground, providing enhanced stability and resistance against movement.

Install Wind Vents in Your Greenhouse Walls

Ventilation is critical for a greenhouse. You need to be able to control the temperature and humidity inside your greenhouse in order to grow plants successfully, so ventilation is the way to go. 

Venting allows you to prevent condensation and overheating, while also preventing mold and mildew growth.

Venting also prevents fogging on the windows, which can make it difficult for you to see inside your greenhouse when there are large fluctuations in temperature outside that cause condensation on the glass panes.

To protect your greenhouse from moisture and ensure its longevity, proper waterproofing is crucial. Our easy-to-follow guide on how to waterproof a greenhouse provides valuable tips and techniques to prevent water damage and maintain a healthy greenhouse environment.

Reinforced Frames make a Stronger Greenhouse Base

If you want to build a sturdy greenhouse, you’re going to need something that can hold it down. The most common material used for this is metal specifically, steel or galvanized steel. 

You can use either of these materials on their own or combine them for added strength. If you go with just one, here are some ways you can use it:

Reinforcing the base of your greenhouse with metal will give it more stability and keep it from slipping around in windy conditions. 

This is especially important if you’re growing plants that need sunlight throughout the day but don’t do well in direct sun exposure like tomatoes and cucumbers.

Using metal as reinforcement on walls will make them more resistant against high winds than they would be without any reinforcements at all which means less chance of damage if strong winds hit during bad weather conditions such as hurricanes or typhoons (which may not be rare depending where exactly you live). 

Trees are often planted around greenhouses because they provide shade—but sometimes trees themselves get knocked over by strong winds which could cause serious damage both inside and outside your greenhouse if left unattended!

Reinforce the Base of your Greenhouse with Metal Straps

This is one of the first things you should think about when building your greenhouse. Metal straps are a good choice for bases because they are strong and durable, but also because they’ll give you peace of mind as your greenhouse grows taller. 

Before purchasing any type of anchor system, make sure that it can hold your greenhouse down in all weather conditions and for years to come especially if it’s on an incline or at high altitude where wind speeds are higher than usual.

Reinforcement MethodDescription
Metal StrapsUse metal straps to reinforce the base of your greenhouse, providing additional stability and strength to withstand external forces.
Concrete FootingsInstall concrete footings to create a solid foundation for your greenhouse, enhancing its overall stability and durability.
Ground AnchorsUtilize ground anchors to secure your greenhouse firmly to the ground, preventing it from shifting or being lifted during high winds.
Cross BracingImplement cross bracing techniques by installing additional diagonal supports, enhancing the structural integrity of your greenhouse.
Steel Frame StructuresConsider using a greenhouse with a steel frame structure, which inherently provides robust reinforcement and durability.

Don’t Forget To Bolt Down Your Base!

If you live in a region with high winds, bolts are a good idea. They won’t hold down the greenhouse itself but will keep it from blowing over and crushing your new tomato plants. 

But if you don’t live in a region with high winds, bolts are not worth it. 

Bolts can be expensive, too especially if you’re using them to bolt down something as large and heavy as a greenhouse (though this is not always the case).

Are you considering a portable greenhouse for your gardening needs? Our expert tips and recommendations on where to buy a portable greenhouse will help you make an informed decision, ensuring convenience, flexibility, and successful plant cultivation in a portable setup.


When it comes to holding your greenhouse down, you have a lot of options. You can choose from a variety of materials, including wood, metal and plastic. 

There are also several ways in which these materials can be used in conjunction with one another.

Ultimately, though, the best choice for holding down your greenhouse will depend on your personal preferences as well as the size and type of structure itself. 

Your location will also play an important role in determining which material will work best for this purpose; if there is heavy wind or rain expected in your area then consider using more than one type at once!

Further Reading

Here are some additional resources for further reading on related topics:

How to Secure Your Greenhouse: Explore this detailed guide for expert advice and tips on securing your greenhouse, ensuring its stability and protection against external factors.

How to Keep a Greenhouse from Blowing Away: Discover effective techniques and preventive measures to keep your greenhouse firmly grounded and prevent it from getting damaged during strong winds or storms.

Tips to Keep Your Greenhouse Cool: Learn various methods and strategies to maintain a cool and comfortable environment inside your greenhouse, ensuring the well-being and optimal growth of your plants.


How can I secure my greenhouse against strong winds?

To secure your greenhouse against strong winds, consider anchoring it to a solid foundation or using ground anchors. Additionally, installing windbreaks and reinforcing the structure with proper bracing can provide added stability.

What are some effective ways to keep a greenhouse from blowing away?

Some effective ways to keep a greenhouse from blowing away include using heavy-duty anchors or concrete footings, placing the greenhouse in a sheltered location, and regularly inspecting and maintaining the structure for any signs of damage or weakness.

How do I prevent overheating in my greenhouse?

To prevent overheating in your greenhouse, you can utilize shading systems or apply shade cloth, ensure proper ventilation and airflow, use automatic vent openers, and consider using cooling systems such as fans or evaporative cooling.

Are there any specific greenhouse cooling techniques I should know about?

Yes, there are various greenhouse cooling techniques you can employ. These include using shade cloths, installing exhaust fans or ventilation systems, utilizing evaporative cooling methods, and implementing proper plant spacing and layout to optimize airflow.

How often should I inspect and maintain my greenhouse for optimal stability?

Regular inspection and maintenance of your greenhouse are essential for optimal stability. It is recommended to perform inspections at least twice a year, checking for any signs of wear, damage, or potential issues with the structure, glazing, ventilation, and other components.