How to build a DIY raised garden bed (2024)

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Learn how to build a DIY raised garden bed with us! Kevin built DIY raised garden beds for the first time about five years ago. He and his dad built them as a birthday present to me one summer and they went all out. The raised garden beds were beautiful. They made them out of 4×4 square, cedar and they had a little ledge that was perfect for sitting as I dug in the dirt. They were solid and held up well year after year.

How to build a DIY raised garden bed (1)

The cost of our old beds

But, those DIY raised garden beds were also expensive. Each one – and they built me just two – was just under $200. Looking at that number now, I’m actually a bit embarrassed. The significant cost was due to the thickness of the 4×4 wood we stacked for each side of the box. However, at the time, we were both working, we had one child and we wanted to make something that was really high quality. That cost us money.

Fast forward to life on the farm and DIY raised garden beds like that are out of the question. We had to figure out how to build a DIY raised garden bed for cheap. The old ones simply cost too much for the amount that we need and I realize for most people even one is out of the question. The thickness quality would be wonderful to have, but we’ve found a way to make more inexpensive, simple DIY raised garden beds that work just as well.

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Our farmhouse raised beds

In 2019, we made four 4×4 DIY raised garden beds, four low 8×4 beds and two high 8×4 beds and they all cost less than $50. In fact, the 4×4 beds cost just about $30. And this is using high quality treated cedar wood. You could make a DIY raised garden bed for less money if you use wood that’s of a lesser quality. But, why? You will just be remaking them sooner if you use wood thats not treated. These raised garden beds worked wonderfully and our garden flourished.

Once we figured out how to build a DIY raised garden bed inexpensively, we made more.In 2020, we made more than 20 new DIY raised garden beds in various sizes using the simple design we used in 2019.

Since 2020 was a bit odd with the coronavirus outbreak, and everyone had some extra time on their hands (unless you were considered essential), there were a lot of people trying to garden for the first time. Being able to feed yourself and possibly help to feed other’s is a blessing and skill I think most people should have.

Keep reading to find all the instructions and make sure to watch the video below so you can see us in action building a box. But, please be kind. This is Kevin’s very first video. 🙂

Why raised garden boxes?

It’s easy to learn how to build a DIY raised garden bed and there’s a few reasons I love them.

  • I like that they provide organization for the garden.
  • They also help to keep a pathway between the crops so that nothing creeps into another veggie’s space.
  • Raised garden beds also help prevent soil compaction.
  • They provide better drainage for fruit and vegetables since they are sitting above the ground. The water always has somewhere else to go. For us this is really important. Our property is fairly low lying and we have some soggy parts, including where the garden is. The beds help to prevent root rot for our plants.
  • And, some people will tell you, they aide in keeping pests away from your crops. However, those pests were made to eat your veggies. They tend to find a way. Although, the boxes do seem to help slow them a bit.

How to build a DIY raised garden bed (3)

How to build a DIY raised garden bed (4)

Supplies needed for the 4×4 DIY garden boxes

  • (4) 4×4’s cut to 12-inches long for corner posts
  • (8) 1-inch x 6-inch cut to 4 feet long
  • (24) 2.5-inch deck screws
  • Hand drill. You can find the Milwaukee Cordless Hand Drill we use here.
  • Miter saw or a table saw – If you don’t have one of these home improvement stores will often cut wood for you. You can find the Dewalt saw we use here.
  • Optional: Sandpaper. We do not sand our boxes since the weather will wear at them natural.

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Steps for assembling the 4×4 DIY garden boxes

  1. Once you have your wood cut into the lengths above, lay everything out.
  2. Begin by screwing in the bottom boards first to the 4×4 corner posts
  3. Once all bottom pieces are attached, screw in each of the top boards to the 4×4 corner posts

Supplies needed for the 4X8 DIY garden boxes

  • (4) 4×4’s cut to 12-inches long
  • (4) 1-inch x 6-inch cut to 4 feet long
  • (4) 1-inch x 6-inch cut to 8 feet long
  • (2) 2×4’s cut to 12-inches
  • (24) 2.5-inch deck screws
  • Hand drill. You can find the Milwaukee Cordless Hand Drill we use here.
  • Miter saw or a table saw – If you don’t have one of these home improvement stores will often cut wood for you. You can find the Dewalt saw we use here.

How to build a DIY raised garden bed (6)

Steps for assembling the 4×8 DIY garden boxes

  1. Once you have your wood cut into the lengths above, lay everything out.
  2. Begin by screwing in the end 4-foot long boards
  3. Once all bottom pieces are attached, screw in each of the bottom, 8-foot side boards to the 4×4 corner posts
  4. Then screw in the bottom 4-foot end boards.
  5. Then screw in the top boards in the same fashion.

What’s next?

Before filling your garden beds with soil, I’d recommend killing the grass in the box area. You don’t need harsh chemicals to do that with either. You can see how we do that naturally – and for almost no cost – {HERE}.

Once that’s done, you can fill them in with multiple different kinds of soil. I’ve found that what works best is often a mixture of compost, topsoil and sand. I like mushroom compost the best but I’ve also used “dairy doo” too.

When your beds are filled, follow the depth and spacing instructions for your specific plants. And, if you’re going to plant multiple kinds of vegetables in one box, make sure you know what grows well together.

Grow some goodness this year, friends. <3

Thank you so much for visiting today! I hope you learned how to build a DIY raised garden bed for cheap! You can see how our 2020 garden turned out {HERE}!

How to build a DIY raised garden bed (2024)

FAQs

What do you put in the bottom of a raised garden bed? ›

Start with a layer of landscape fabric to prevent soil from washing out. Above this, a layer of gravel or small stones can aid in drainage. Then, fill the bed with a mix of topsoil, compost, and other organic matter. This layered approach ensures good drainage while providing a nutrient-rich environment for plants.

What is the cheapest method for raised beds? ›

Pallet garden beds are a very simple and inexpensive way to create a raised garden. All you need is a pallet, some wood boards, and screws to assemble the pallet garden bed. Making a raised garden bed from pallets is very easy and can be done in just hours.

How deep should soil be in a raised bed? ›

A raised bed does not always require a significant depth for it to be effective. They should have at least 8 inches of soil depth to accommodate the root systems of plants, because the majority of plant roots require 6 – 8 inches of soil for healthy root growth.

What is the best base for a raised garden bed? ›

Organic material is the best option, as it improves drainage as well as enriches the soil as it breaks down, and does not need to be removed from your raised beds later on.

What dimensions should a raised garden bed be? ›

An ideal size for a raised bed is 3 to 4 feet wide with the length to suit the space available. It is most often rectangular in shape and generally 8 to 12 feet long. The bed may be as much as a foot deep, depending on the type of plants being grown.

Why put cardboard in raised beds? ›

It acts as a physical barrier to block out pernicious weeds. Usually, 2 – 3 layers of cardboard will suffice, though you may want layers in more weed-prone areas. The damp environment created by the cardboard is conducive to earthworms and other beneficial soil microorganisms.

Should I put landscape fabric under raised bed? ›

The fact is, landscape fabric is not a necessity if say, you want to control weeds because the confined space makes it easier to control weeds. But, you can use landscape fabric as a raised bed liner for other reasons, such as preventing soil erosion or improving the life of the raised bed itself.

How many bags of soil do I need for a 4x8 raised bed? ›

As a rule of thumb, a 4'x8' raised bed that is 6 inches deep requires approximately 8 bags of soil while a 4'x8' raised bed that is 12 inches deep requires approximately 16 bags of soil.

Is it cheaper to make or buy raised garden beds? ›

On average, a DIY raised bed constructed from wood will cost $25 to $50 per square foot. To have a wooden raised bed constructed and installed for you, budget for at least $100 per square foot. (Find a kitchen garden company in your area.)

What vegetables do well in raised beds? ›

Raised beds also work well for those vegetables that require a certain minimum soil temperature for the seeds to germinate, or for young seedlings to grow. Beans, eggplant, melons, watermelons, okra, peppers, pumpkin, and squash all need a minimum soil temperature of 60°F (15°C) for seed germination.

Is it cheaper to build or buy a raised bed? ›

Store-bought raised garden beds come in a variety of sizes and styles, but can be pricey. For those interested in raised bed gardening without the expense, these DIY raised garden beds with step-by-step instructions can be built in a few hours and often for a fraction of the cost of store-bought kits.

Is Miracle Gro garden soil good for raised beds? ›

While potting mix alone is too light for use in raised beds, creating a 50:50 blend of potting mix and Miracle-Gro® All Purpose Garden Soil will give just the right balance. Top-notch potting mix and raised bed soil may cost more than low-quality versions, but you really get what you pay for.

How deep should raised bed be for tomatoes? ›

Tomatoes should ideally be grown in a raised bed that's at least 15 to 18 inches deep. Many of my clients in Houston are successfully growing tomatoes in 12-inch deep raised garden beds, but their plants tend to be a little stunted compared to plants in deeper beds.

Do you put topsoil in raised beds? ›

Fill the bed with compost and a soilless growing mix in a 1:1 ratio. Topsoil can be added (up to 20% by volume) for beds that are at least 16 inches deep.

What is the best filler for the bottom of a raised bed? ›

Plant Waste or Compost

This scoop of “stuff” is a lot of things together. We have a huge pile in the back of our property where we burn leaves, large pieces of wood that we don't want to split, twigs, etc. It's really good to layer all of that stuff in your raised beds as it will break down even more.

Should I put sand in the bottom of my raised garden bed? ›

A strong and stable base is essential for the health and productivity of your raised garden bed. By using the right materials, such as gravel, landscape fabric, sand, compost, cardboard, or soil, you can create a well-draining and nutrient-rich foundation for your plants.

Should I put anything in the bottom of my planter? ›

One of the best things to put at the bottom of a planter for drainage is broken pieces of pot. You can use any unwanted plant pots or chipped crockery for this – simply smash them up into small to medium-sized pieces. Adding a layer of broken pieces of pot like this will prevent compost loss out of the drainage holes.

What is the best bottom for a planter box? ›

Spoonemore says, “You can use saucers or trays underneath planters to catch excess water and prevent it from leaking onto floors and furniture. Alternatively, you can place planters on waterproof mats or trays specifically designed for indoor gardening to protect surfaces from moisture.”

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