Follow this easy tutorial on how to build easy, affordable raised garden beds! This DIY is cheap and will last for years! The tutorial will give you some great ideas on the best raised garden bed designs and layout.
The Benefits Of Raised Garden Beds
Raised garden beds are a great way to create an organized garden space, especially when you have limited space for planting a garden.
Building raised garden beds yourself will save you money, and this DIY tutorial will show you exactly how.
Raised garden beds provide easy drainage, and help keep pests out. We’ve built both rectangular 4ft x 8ft raised garden beds and square 4ft x 4ft beds using a similar design, so pick whichever fits better in your space.
This tutorial will show you how to build raised garden beds that will last for years!
Ready to build your own raised garden beds? Keep reading this tutorial to learn how to make a simple, easy DIY garden bed – or if you prefer video content, checkout our YouTube tutorial below!
Tip: The Home Depot has great delivery options. Many of the items on their website include free 2 day delivery. They also offer same day delivery as an option! Check out their delivery options for lumber and other supplies. Availability and delivery fees may vary by region.
What kind of wood should you use for raised beds?
We chose to use untreated 2″ x 10″ construction lumber to build our raised garden beds. Untreated lumber is cheap, contains no unwanted chemicals, and will last a minimum of 5-10 years depending on the local climate.
You can expect untreated wood to hold up for 10+ years in dry climates, however, in wet areas it may need to be replaced in as little as 5 years.
Many people choose to build raised garden beds with pressure treated lumber. While the treated lumber does last longer, it also costs almost double. In addition to the added expense, the chemicals used in the pressure treating process can seep into the soil.
We love eating the home grown vegetables grown from our garden, so we used untreated lumber to minimize any risk of contamination.
Four feet by eight feet (4′ x 8′) is an easy size for raised garden beds because you can buy 8ft lumber, and it allows for minimal cutting. Then you’ll only need to make one cut to complete this project!
For our raised garden beds, we made the long sides of the beds 8ft long so we could use full length, un-cut 2″ x 10″ x 8ft boards.
Then, to make the boards for the short sides of the frame, we just needed to cut a 4′ x 8′ board in half.
Tip: For a smaller bed size, making 4′ x 4′ square beds would be just as easy. Simply cut two boards in half and use all four boards to create a square frame.
We constructed the wood frames on our driveway to make use of the clean, flat work surface. Having a nice work surface makes the project easier and quicker.
Step 3: Fasten Boards Together
Once the cuts were made, it was time to assemble the raised garden beds!
Long construction screws will hold the boards snugly together for the life of the raised garden bed.
You could also use nails to secure the frames together, but they have a tendency to start coming apart after a year or two. Also, sometimes warped boards will start pulling nails apart within a few days, so keep that in mind.
GET THE RIGHT TOOL FOR THE JOB
Pssstttt…. If you love DIY home renovation projects, checkout my Must Have Tool Guide. It has 17+ tools that I think every DIYer should own!
Moving & Prepping the Garden Bed Frames
After the raised bed frames were finished, we moved them to their spot in the back yard. The assembled frames aren’t super heavy, but they are a little bit awkward to move.
Teamwork makes this step much easier.
What should you put on the bottom of a raised garden bed?
To get our beds ready for soil, we used a DeWalt String Trimmer to cut the grass down as short as possible. There’s no need to remove grass and clippings – once buried, they just become compost/fertilizer.
Some gardeners recommend placing cardboard or landscape cloth at the bottom of the raised garden bed frames before filling with soil. This prevents existing grass and weeds from growing up through the soil.
In our experience, using an underlayment hasn’t been necessary. If you decide to use shorter frames that won’t hold as much soil, then it would probably be a good idea.
We recommend against using Roundup or any other harsh chemicals to kill the grass, especially if you’re planting fruits & vegetables in your raised garden beds!
How deep should a raised garden bed be?
We’ve found that around 10 – 12″ deep is ideal for raised garden beds. Shallow beds can work, but you start losing out on some of the benefits of raised beds.
Garden beds deeper than 12″ don’t really provide additional benefits, but they are more difficult, and more costly to build. On the bright side, tall garden beds can be easier on your back (you don’t have to bend over as far).
Pre-Made Garden Beds
If you’d rather purchase a pre-made, ready to assemble kit, check out my top picks for Best Raised Garden Beds. It includes popular designs with tons of options ranging from galvanized steel, to cedar, to rattan and many more.
They’re available in a range of sizes that will work with any garden space.
Here’s one of my favorite pre-made raised garden beds from the list. It’s available on Amazon with free Prime shipping, and only costs around $80!
Filling The Raised Garden Beds
We were able to get some free top soil from a friend to fill our raised garden beds. You can usually buy inexpensive top soil at a nursery, or garden supply store if you have a pickup truck to haul it.
It’s also pretty easy to buy bagged soil to fill the beds, but it does cost a little bit more.
This mix is specially blended for soil in garden beds, and can continuously feed for up to 9 months. We added 4 bags to each raised bed and our garden is thriving!
How much soil does it take to fill a raised garden bed?
A 4ft x 8ft raised garden bed that is 10″ tall has a total volume of 24.22 cubic feet, or .9 cubic yards.
Most bags of soil are either 1.5 cu. ft. per bag, or 2 cu. ft in volume. To fill a 4ft x 8ft raised bed like we’ve built here, you’ll need seventeen 1.5 cu. ft bags of soil, or thirteen 2 cu. ft bags of soil.
To plan ahead for this settling, make sure to overfill the beds by a little bit. We’ve found that if you mound a few extra inches of soil over the top of the frames, it will end up settling down to flat over time. It’s difficult to add more soil later on because you’ll end up burying your plants!
Keep in mind, you shouldn’t try to compact the soil to prevent settling. Soft fluffy soil is perfect for young plants that are trying to grow roots.
Going with a smaller size for your raised garden bed?
To fill a 4ft x 4ft raised garden bed, you’ll need 12.11 cubic feet or .45 cubic yards of soil. This equates to nine 1.5 cu. ft bags of soil, or seven 2 cu. ft bags of soil.
Note: Many bags of soil are either 1.5 or 2 cu. ft, however many other sizes are available. Be sure to calculate the number of bags based on the exact size of the bags you’re buying. And always round up so you can over fill the beds slightly!
Printable Garden Planner
Feeling overwhelmed trying to keep track of all your gardening details–when to plant what, which seeds need extra watering, and what was that fertilizer hack that worked so well last year?
My first few years of gardening, I didn’t keep track of anything because I really thought I’d remember – but nope! I forgot it all. This is exactly why I’ve created the Printable Garden Planner.
Planting The Garden
After you’ve built your raised garden beds, it’s time for the fun part – planting the crops!
In our garden, I planted all of our favorite vegetables, plus a few flowers and some lavender. Raised garden beds are perfect for almost any plant.
For an easy way to get started with your raised vegetable garden, check out this Set of 30 Vegetable & Herb Seeds (Amazon). It has all the varieties you love, and they’re all Heirloom and 100% Non-GMO!
Here’s my top picks for vegetable seeds. They’re perfect for planting in raised garden beds.
This gardening hack is so convenient – it’s easy to install, and it’s way cheaper than you might think. Having the watering duties handled automatically takes the hassle out of gardening.
You don’t need a ton of fancy tools to get into gardening, but there are a few necessities you’ll want to have on hand. These are the gardening tools I recommend:
How To Keep Deer and Other Animals Out
If you live in a rural area, there’s a good chance that deer could eat your precious vegetables! This7.5ft Garden Netting (Amazon) is the perfect solution.
It’s durable, easy to install, and keeps birds, deer and other animals out of your raised garden beds.
Want more ideas for your backyard? Checkout these posts:
By cutting the grass down to almost nothing and filling in with soil, we didn’t have any issues with grass growing up through the soil. If you are worried about that, I would recommend putting a layer of weed barrier down to be safe.
Lisa
Hello Ashley, I love your raised garden bed, I want to use this for my vegetable garden this yea. Last year I used weed fertilizer on the lawn and black mulch is on so parts of my lawn that fell out from the edging garden against the house. I need to know if this will effect my vegetable garden, even if i try to clean it up and use your advice of soil, reg soil, miracle grow and peet moss. Thanks, Lisa
Hi Lisa! I wouldn’t worry about the weed killer you put on the lawn last year, all of it should be gone at this point. I would just trim the grass inside the bed down really short (we used a weed wacker on ours), and then put your soil mix right on top. It should be fine! Happy gardening!
Marie Antionette
Thanks for the A-Z tutorial! I will definitely be doing this, and laying weed barrier. Can’t wait!
Nice and detailed instruction to build a raised garden bed. I think it is late for this year to build and grow veggies, I will get myself prepared for next year.
Thanks Frenchie! The biggest issue I foresee with building these on top of cement is that the soil would not be able to drain properly… I would not install a bottom, and I would recommend drilling several small holes around the base of the frames for water drainage.
What about critters like rabbits? Isn’t the raised garden still low enough for them to be able to get into your garden and help themselves? What do you do to deter them?
Hi Janice! We haven’t really had problems with little critters like rabbits. But to make the raised beds taller, you can just make a 2nd identical frame and stack them on top of each-other, and fasten them together.
Megan
So excited I followed your steps on this blog and just built my first 4×8 garden beds from recycled wood at our house all while the husband was at work.
I have been doing raised beds for 10 years now. They say they will last 5 years. I am in Maine. Some of mine have lasted the 10 years. But most of them the 4″x4″ corner posts the ants have eaten up. So I have been replacing beds for the past 3 years now.
Have read some where that cinnamon keeps the ants from eating the wood. Have tried it with the last bed I replaced.
Mine where 12″X 16’X 4′ . That size is ok but you need something to sit on on the 2″ edge of the board. My new one are ranging from 4′ wide to 3′ wide depending where they are. Any new beds I am making 24″ high so that it is much easier for me to pick and not have to sit down on the edge.
My suggestion is to try cedar posts to hold them together. The boards are not rotting that fast just the corners.
I have my original 2 that this year I will have to repair. They have asparagus in them so it will be harder to repair them.
Mine has been trail and error since I did not know how to do them when I started.
My best beds the soil was made by the lasagna method. This is a layering on peat moss compost, cardboard on bottom. I have found this has worked out great for me.
I have been composting right into my beds for the past 2 summers now. It has increased the worms a lot. Which helps your soil.
Good luck.
I love your garden map diagram. Ha!! Very organized. ??
You guys are so handy!! I wish I could build my own little garden. Great post babe!!
xx,
Abby
Thanks! Luckily I had my husband around to do all the hard work 😉
What kind of flowers grow well in a raised bed? What about perennials?
I think perennials would do great! I have lavender in mine, but I’ve seen other people grow marigolds and daffodils too!
Thanks for the info. Since it’s getting late in the season, I’m just going to throw a few annuals in and see how they do. Practice makes perfect!
These look great and simple! How’d the depth do for you? Would you recommend going deeper or did your plants do well at that soil depth?
The depth worked great! I don’t think you’d need to go any deeper than this.
how did you not get grass growing up from below? don’t you need to kill the grass before the dirt?
By cutting the grass down to almost nothing and filling in with soil, we didn’t have any issues with grass growing up through the soil. If you are worried about that, I would recommend putting a layer of weed barrier down to be safe.
Hello Ashley, I love your raised garden bed, I want to use this for my vegetable garden this yea. Last year I used weed fertilizer on the lawn and black mulch is on so parts of my lawn that fell out from the edging garden against the house. I need to know if this will effect my vegetable garden, even if i try to clean it up and use your advice of soil, reg soil, miracle grow and peet moss. Thanks, Lisa
Hi Lisa! I wouldn’t worry about the weed killer you put on the lawn last year, all of it should be gone at this point. I would just trim the grass inside the bed down really short (we used a weed wacker on ours), and then put your soil mix right on top. It should be fine! Happy gardening!
Thanks for the A-Z tutorial! I will definitely be doing this, and laying weed barrier. Can’t wait!
You’re so welcome! And that’s a great idea 🙂
Nice and detailed instruction to build a raised garden bed. I think it is late for this year to build and grow veggies, I will get myself prepared for next year.
Glad you found this tutorial helpful, Bala!
Great idea! Do you have any recommendations for building these on a cemented (ground) backyard? Thinking maybe there should be a bottom…Maybe?
Thanks Frenchie! The biggest issue I foresee with building these on top of cement is that the soil would not be able to drain properly… I would not install a bottom, and I would recommend drilling several small holes around the base of the frames for water drainage.
What about critters like rabbits? Isn’t the raised garden still low enough for them to be able to get into your garden and help themselves? What do you do to deter them?
Hi Janice! We haven’t really had problems with little critters like rabbits. But to make the raised beds taller, you can just make a 2nd identical frame and stack them on top of each-other, and fasten them together.
So excited I followed your steps on this blog and just built my first 4×8 garden beds from recycled wood at our house all while the husband was at work.
Woo-hoo! Way to go Megan! Love this!
I have been doing raised beds for 10 years now. They say they will last 5 years. I am in Maine. Some of mine have lasted the 10 years. But most of them the 4″x4″ corner posts the ants have eaten up. So I have been replacing beds for the past 3 years now.
Have read some where that cinnamon keeps the ants from eating the wood. Have tried it with the last bed I replaced.
Mine where 12″X 16’X 4′ . That size is ok but you need something to sit on on the 2″ edge of the board. My new one are ranging from 4′ wide to 3′ wide depending where they are. Any new beds I am making 24″ high so that it is much easier for me to pick and not have to sit down on the edge.
My suggestion is to try cedar posts to hold them together. The boards are not rotting that fast just the corners.
I have my original 2 that this year I will have to repair. They have asparagus in them so it will be harder to repair them.
Mine has been trail and error since I did not know how to do them when I started.
My best beds the soil was made by the lasagna method. This is a layering on peat moss compost, cardboard on bottom. I have found this has worked out great for me.
I have been composting right into my beds for the past 2 summers now. It has increased the worms a lot. Which helps your soil.
Good luck.
Thanks for sharing all of these amazing tips, Rosemary!
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