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Steps To Build You Own Metal Raised Garden Beds

Gardening is an activity that can enhance the beauty of your homestead, provide healthy and fresh produce, and fetch some extra dollars. Metal-raised garden beds are a smart and practical way to grow fruits, veggies, and herbs. They are durable, easy to maintain, and offer many benefits to a homesteader. This article will delve into the essential materials and tools required to build metal-raised garden beds, the sizing options, the importance of bracing, and provide a step-by-step guide to building one. Also, we will explore the impact of metal beds on soil temperature, analyze the best materials for homestead-raised beds, and suggest some ideal plants to grow in them.

What are the basic materials used to build metal raised garden beds?

The first step to building metal-raised garden beds is to collect all necessary materials. You will need metal panels, untreated wood, screws, roof flashing, wood sealer, and a top cap. You can easily order these materials online, or if you have a metalworking shop nearby, they can supply you with the required metal sheets.

basic materials used to build metal raised garden beds?
Basic materials used to build metal raised garden beds?

Required Tools for Build Metal-Raised Garden Beds

To build a metal-raised garden bed, you will need some essential tools, such as a saw, drill, measuring tape, a level, and a pair of pliers.

Sizing Options for Metal-Raised Garden Beds on Your Homestead

When selecting the size of your metal-raised garden bed, you should consider the available space on your homestead, the amount of product you plan to grow, and your budget. The standard size for a metal-raised garden bed is 4ft X 8ft. However, you can customize the size based on your preferences and available resources.

The Importance of Bracing for Your Metal-Raised Garden Beds

As metal sheets are quite heavy, bracing is necessary to support the weight of the bed. The bracing can be done by adding extra support beams below the bedframe or using sturdy corner brackets.

Step-by-Step Guide to Diy Build Metal-Raised Garden Beds

Here is how you can DIY build a metal-raised garden bed:

1. Choosing the right metal: There are several options for choosing metal for your garden bed. Galvanized steel, aluminum and Cor-Ten steel are popular choices. Cor-Ten steel is known for its rusting colour and sturdy durability. Galvanized steel is resistant to rust and corrosion, making it ideal for long-term use. Aluminum is the lightest option and is also resistant to rust and corrosion. But recently, a new material has been discovered that is not only highly corrosion and rust resistant, but the colour coating attached to the outside is also safe and non-toxic, meeting all the needs of gardening enthusiasts.

Order The Metal For Your Raised Metal Garden Beds

2. Measuring and cutting the wood: When selecting the wood for your garden bed, choose untreated lumber safe for plants and animals. Cedar wood is a popular choice because of its natural resistance to rot. First, measure and cut the wood to the required size. The bed frame requires four pieces of wood cut to the same length. Additionally, you will need to cut extra pieces for the top cap and support brackets.

Measure And Cut The Wood

3. Sealing the wood: To prevent the untreated wood from rotting, apply a non-toxic wood sealer to all sides of the wood. Allow the sealer to dry completely before moving on to the next step.

Add Sealer To The Wood

4. Assembling the frame: Using screws, assemble the wood frame for the metal sheets to rest on. The frame needs to be sturdy enough to support the weight of the metal sheets. Be sure to predrill holes to prevent the wood from splitting during the screwing process.

Create Your Metal Raised Garden Bed Frames

5. Adding the roof flashing: To reduce the chances of sharp edges, use pliers to insert roof flashing into the bed frames.

Insert The Roof Flashing To Your Raised Metal Garden Boxes
Insert The Roof Flashing To Your Raised Metal Garden Boxes

6. Installing the top cap: After completing all the prior steps for your metal raised garden bed, it is crucial to install the top cap correctly. The top cap is the raised portion of the frame that will be the finishing touch to your garden bed while providing a functional seating area.

Installing the top cap: 

First, to install the top cap, ensure that the metal panels you installed are entirely covered on the edges with at least a 5/8 inch overhang on the inside of the frame. This overhang protects you or someone else from getting cut on the metal and ensures the panels are securely in place.

Next, place the top caps onto the top of the frame, ensuring they are correctly laid out and aligned. Then, screws and an impact driver attach the top cap to the frame. We recommend placing a screw every eight inches to hold the top cap.

To ensure that the corners are tightly secured, use your drill to predrill holes in the mitered edges and then attach a screw to bring the corners together. This step will prevent any potential gaps that could limit the performance or appearance of your garden bed.

Completing this installation step will create a beautiful and functional structure that provides an ideal growing environment for your plants while adding a lovely touch to your outdoor space. By following these steps precisely and installing your top cap correctly, your metal raised garden bed will stand out in your garden for years to come.

7. Touching the sealer: Follow the manufacturer’s instructions to touch up the sealer on the wood frame that may have rubbed off during installation.

Touching the sealer

8. Installing the metal panels:

Installing the metal panels:

When installing metal panels for your metal-raised garden bed, there are several steps to ensure they are adequately fixed and secure. The following instructions will guide you through the process of installing the metal panels for your garden box:

Step 1: Get Two Wagler Panels

First, get two Wagler panels, ensuring the coloured side faces out. These panels will be placed across the inside of the frame with a one-inch overlap of the panels. The key is ensuring the panels are the same size as the frame to avoid gaps or wiggles. Pay attention to the positive and negative aspects of the two spliced panels. Use the tool that comes with the package to handle this, or use a small household drill if you want to increase speed.

Step 2: Fasten the Panels Using Roofing Fasteners

Using roof fasteners, fasten the panels at the overlap points first. Start by placing the fasteners on the top and bottom of the frame. Ensure the panels are flush with the frame and that no bends or dips could cause water to pool. If the panels are bent, you can correct them slowly with a tool, not too fast; too fast may distort the metal and damage the finish.

Step 3: Continue Fastening the Panels Every 6 Inches

To ensure that the metal panels are adequately secured, fasteners are added every six inches at the top and bottom of the frame. This will ensure that the panels are secured with no weak points. Please wear good gloves when assembling. Due to the process problem, there may be some merchants’ products without edge wrapping treatment; the edges may have burrs; if you inadvertently stick your hand, please go to the hospital to remove it and decide whether to inject tetanus under the advice of a doctor.

Step 4: Place a Fastener at the Overlap of the Roof Flashing and Panels

Place a fastener at the overlap between the roof flashing and the panel to join the two together. This will increase the integrity of the joint between the panel and the flashing, ensuring that the filler you put in later will remain intact. You can also build an organic incubator bag into the garden bed, which will not only ensure that no mud or water will run off when the installation is not tight but will also ensure that the roots of the plants have adequate ventilation.

Step 5: Repeat this Process for the Other Long Side of the Garden Box Frame

Finally, repeat the process for the other long side of the garden box frame. This will ensure that both sides of the garden box frame have metal panels that are properly secured and ready for the fill.

9. Filling in the bed: Once the metal-raised garden bed is in place, it’s time to fill it with soil and plant your vegetables, fruits, and herbs. Be sure to choose quality soil rich in nutrients and has a good drainage system.

Filling in the bed

What To Put On The Bottom Of Raised Garden Bed?

Adding the right materials to the bottom of your raised garden bed can help to promote good soil drainage, aeration, and nutrient retention. Some materials include weed barrier fabric, compost, or coarse gravel. These options will allow proper water drainage while preventing soil from washing out of the bed. Before adding any material to the bottom of the bed, ensure that it is level and firm to prevent deformation over time. Ultimately, your choice of material will depend on the plants you are growing and the soil composition in your area.

Read more:

What to put on the bottom of the raised garden bed?

Ideal Plants for Homestead Metal-Raised Beds:

Metal-raised garden beds are the perfect environment for growing various vegetables, herbs, and fruits. Their deep soil depth allows for excellent root growth and minimizes pest and weed problems. Therefore, the ideal plants for homestead metal-raised beds are corn, lettuce, peas, tomatoes, carrots, and beets.

Metal Beds’ Impact on Soil Temperature:

Metal-raised garden beds can influence the soil temperature and create a favourable environment for growing vegetables. During the day, they absorb solar heat; at night, they transfer heat to the soil in the raised bed. Therefore, raising the temperature in the bed and creating a suitable germination environment for some vegetables and herbs.

Metal vs. Ground: Safest Option for Plants:

Planting directly into the soil has drawbacks, like soil erosion, weeds, and pest infestations. Raised garden beds offer a safer option, and metal raised garden beds have even more benefits. They act as a physical barrier, keeping pests away from the nutrients you’ve added to the soil and the crops you’re growing. Similarly, the raised bed’s environment has better drainage, moisture retention, and water distribution, allowing for healthier plant growth.

Frequently Asked Question

Q1: Can I Customize the size and shape of my metal-raised beds?

A1: You can make the beds longer and wider and even add tiers.

Q2: How deep should my metal raised garden beds be?

A2: The most appropriate depth is 8-12 inches, but you can add more layers to grow some vegetables with deep roots.

Q3: How do I fill my metal raised garden beds with soil?

A3: Filling a metal raised garden bed with soil is straightforward. First, ensure the bed has proper drainage by adding drainage holes if it has none. Then, fill the bed with a high-quality soil mixture, creating a level surface. If you have a deep bed, consider mixing in compost to provide additional nutrients for your plants. Finally, water the bed thoroughly to ensure proper soil settling and moisture distribution.

Q4: Which is better, metal or wooden raised garden beds?

A4: Metal-raised garden beds are stronger, more durable, and easier to maintain than wooden beds.

Q5. What materials do I need to construct a metal-raised garden bed?

A5. To build a metal-raised garden bed, you will need the following materials: metal sheeting, drill, screws, corner braces, wood or metal stakes, and safety gear such as gloves and eye protection.

Q6. What options do I have for sizing my metal-raised garden bed?

A6. The size of your metal-raised garden bed will depend on factors such as available space, the number of plants you wish to grow, and your preferences. You can customize your bed to any size that works best for you.

Q7. Why is bracing so important for metal-raised garden beds?

A7. Bracing provides crucial support and stability to metal-raised garden beds. It prevents the sheets from bowing and bending, leading to rusting and damaging your plants.

Q9. Will metal-raised garden beds heat up too much in the sun, causing damage to the plants?

A9. On the contrary, metal-raised garden beds provide better plant temperature control than other beds. They absorb and distribute heat evenly, helping keep the soil warm and extending the growing season.

Q10. What kind of metal is best for constructing a raised garden bed?

A10. Some ideal metals for raised garden beds include galvanized steel and aluminum. They are sturdy, rust-resistant, and long-lasting.

Q12. How long can I expect a metal-raised garden bed to last?

A12. Proper maintenance and care mean a metal-raised garden bed can last up to 20 years.

Q13. What are some of the advantages of using a metal-raised garden bed?

A13. Metal-raised garden beds offer numerous benefits, such as durability, easy maintenance, prevention of soil erosion, improved drainage and aeration, and customized sizing options.

Q14. Which plants are ideal for growing in a metal-raised garden bed?

A14. Some ideal plants for metal-raised garden beds include tomatoes, peppers, lettuce, herbs, and root vegetables like carrots and radishes.

So, how will you expand your homestead gardening space?

In conclusion, you are building a metal-raised garden bed efficiently and practically boosts your homestead’s gardening experience. By following the steps in this essay and using the necessary materials and tools, you can create a garden bed that will last for years and provide abundant harvest. With improved soil drainage, temperature control, and customized sizing options, metal-raised garden beds are an excellent investment for any homesteader looking to optimize their gardening experience.


Gardening blogger

Meet Even, a distinguished collaborator at Green Giant. With over a decade of hands-on experience in the niche of raised garden bed cultivation, she brings an unparalleled depth of knowledge to our team. Her expertise, honed over years of experimental gardening, provides an insightful perspective on the practicalities and nuances of this unique form of horticulture.

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