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.

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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.

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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 kind of wood should be used for raised beds? ›

Here are some options: Cedar and redwood are naturally water-resistant but can be expensive and hard to find. Hemlock, fir and pine are suitable materials for raised beds but aren't very long lasting. Pressure-treated lumber is also an option, but it's been a controversial topic for many years.

Is it cheaper to buy or build 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 is the cheapest way to make raised beds? ›

Raised beds made of cinder blocks or concrete blocks

Cinder blocks and concrete blocks are very inexpensive (typically $2 to $3 a piece at home improvement centers), and they make it really easy to build the outline of a raised garden bed.

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

Some gardeners chose to implement a barrier at the bottom to keep out pests and weeds. Below are a few materials you can use: Cardboard or newspaper: Cardboard is a great option if you are on a budget. You can line the bottom of your raised garden bed with cardboard and newspaper to deter pests and weeds.

How deep should a raised garden bed be? ›

The minimum required depth depends on the plant. But on average, a raised garden bed should accommodate about 20 inches of soil for the roots of flowers and vegetables.

Is treated lumber OK for raised garden beds? ›

He stated in a bulletin titled, Treated Wood in Raised Bed Gardening, “Scientific evidence and data have shown that using pressure treated wood for raised bed or box gardening is safe to adults and children in terms of the plants grown and used in these containers.” He further explains, “All chemicals in consumer ...

Should raised beds have a bottom? ›

Planter bottoms usually are slatted, with some type of semi-permeable cloth barrier which permits drainage. Raised beds, however, do not have bottoms; they are open to the ground, which offers the benefit of permitting plant roots to go further into the ground for available nutrients.

Do I need to replace soil in raised bed? ›

The soil in your raised beds will break down over time; however, you don't need to replace all of the soil in your raised bed garden to have beautiful, vibrant, or bountiful plants. Before planting the following growing season, add Miracle-Gro® Refresh™ Soil Revitalizer to your old soil, following package directions.

Can raised bed soil be used in ground? ›

Raised beds are a hybrid between a landscape bed and a large container and thus the soil used in raised beds is a hybrid as well. You can't just use the soil in your garden which will compact too much for plant roots to be happy.

What vegetables grow best in raised beds? ›

Most garden vegetables will grow well in raised beds. Try growing lettuce, greens, radishes, and strawberries. Bush type vegetables, such as tomatoes, cucumbers, and beans also do well in raised beds. You can install trellises for vegetables that need support, like some tomatoes and beans.

What vegetables do well in raised beds? ›

The best vegetables to grow in a raised garden bed are those that will provide the best flavor and bang for your buck. Some good options include bush beans, leaf lettuce, cucumbers, and a variety of colors of squash.

What vegetables grow well together? ›

Which Vegetables Grow Well Together?
VegetableCompanion PlantDon't Plant Together
OnionsBeets, carrots, Swiss chard, lettuce, peppersAll beans and peas
PeasBeans, carrots, corn, cucumbers, radish, turnipGarlic, onions
PotatoesBeans, corn, peasTomatoes
SquashCorn, melons, pumpkinsNone
11 more rows
Jun 26, 2021

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.

Do you put landscape fabric under raised beds? ›

Depending on your budget and gardening goals, you can line the bottom of your raised garden beds with wide-mesh hardware cloth, stainless steel mesh, landscape fabric, burlap sack, or newspaper/cardboard.

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

For a 4x8-foot raised bed with a 6” height, using Mel's Mix: about 5 cubic feet each of compost, peat moss, and vermiculite is needed. It usually takes about two to three bags of purchased fertile mix (1.5 cubic feet each) to cover the bed surface to a depth of 2 inches.

What wood should not be used in a raised garden bed? ›

Avoid using older types of wood treatments such as CCA, creosote, and Penta-treated lumber. Research from Oregon State University showed that pressure-treated lumber does increase soil copper concentrations by a minor amount, but only within 1 inch of the raised-bed edge.

What is the best material to build a raised garden bed? ›

Raised garden beds can be constructed from a variety of safe and sustainable materials. Cedar or redwood are two great options for wood as they are naturally rot-resistant and won't leach harmful chemicals into the soil.

Do you need to treat wood for raised beds? ›

Building your own wood raised beds is often the most cost-effective way to get set up and growing. My favorite wood to use is untreated cedar. It's more expensive than something like pine, but it will last a lot longer. I try to avoid treated wood because they used to use some really toxic stuff to preserve each board.

What is the cheapest wood for raised garden beds? ›

What kind of wood should be used for raised beds? Cedar wood is the most affordable and is a naturally rot-resistant wood due to natural oils.

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