New YouTube video on mini raised bed made from one pallet.
Here is an interesting YouTube video latest release on making a mini raised bed out of one pallet by James Prigioni who has a gardening related YouTube channel that I have enjoyed for a number of years.
One of the things I really like about his design is that he has the corner supports and the mid-length supports for the wood on the outside of the framing. That way, when you fill the raised bed with soil, it pushes the sidewall and end piece wood into the framing support. I have seen too many wooden raised bed videos that have the framing on the inside of the raised beds, and the sidewall and end piece wood tacked on to the outside. After a few years, the constant pressure of the raised bed soils pushes out the outside wood pieces and you have a blowout. That's why I think the better design is to have the framing on the outside for the raised beds.
I make my pallet wood raised beds a little differently, but the concept of having the strong framing on the outside is something I discovered is a real benefit years ago. For example, here is one of my pallet wood raised beds under construction, not yet filled with hügelkultur wood and soil.
View attachment 3460805
There are a couple of concepts that I would like to point out in this design.
First of all, like I mentioned, you can see that my 2X4 framing is on the outside of the raised bed. The pallet wood planks are attached inside the frame. That way, when the raised bed is filled with soil, the pressure of the heavy soil pushes the pallet wood against the sturdy 2X4 frame. If you have the pallet planks on the outside of the 2X4 frame, then you risk a blowout after a few years from the constant pressure of the soil in the raised bed.
The second advantage of this particular design is that I am using the shorter 16-inch-long pieces of pallet wood planks, attached vertically, that I have cut off from between the pallet wood 2X4 stretchers. If you use the very fast circular saw method of pallet breakdown of cutting the pallet planks between the 2X4 stretchers, you end up with plank pieces that are usually 17-18 inches long. I cut my plank pieces down to 16 inches after that for most of my projects.
Third bonus, notice that the 2X4 framing allows you to use lots of other plank pieces that you might have laying abound that are only 13, 14 or 15 inches long. All I do is make the plank flush to the top of the raised bed. You don't need exactly 16 inches of plank to fill the frame from top to bottom, A 13 inch long plank will still sit flush on top and give you a good 1/2-inch overlap on the bottom 2X4 frame. Good enough to hold in the raised bed soil. I used up lots of shorter "scrap" plank pieces that way on one of my pallet wood raised beds.
Fourth reason, you can use pallet plank pieces of any thickness if you attach them to the inside of the frame. You don't have to have pallet planks of the same thickness on this design. You just attach them to the inside of the frame and they all automatically are flush on the outside where you see them. You don't care if the boards are different thicknesses on the inside. That will be covered up by the raised bed soil. Don't sweat the small stuff, use any thickness pallet planks and you will be good to go.
Fifth benefit - If you don't care about having the pallet planks flush with the top of the raised bed framing, you only need plank pieces that are long enough to cover the 9-inch-high void in the frame (in my 16-inch-high design). So, you can even use shorter scrap pallet plank pieces in that case. Why would you do this? Well, you might decide that you don't need the pallet plank wood to be flush with the top of the 2X4 frame because you intend to fill the raised bed to the top with soil. Or, you might want to add some top boards to the frame to sit on, which would hide any non-flush pieces of wood planks below.
Here is a picture of some pallet wood planters that use top boards for decoration...
View attachment 3460850
You can see that these top boards, on a raised bed, would hide any non-flush pallet planks inside and underneath the top board.
There are lots of ways to successfully make raised beds. I hope some of these comments from my experience make sense to you. It works for me in terms of have a solid structure and it allows me to use shorter pieces of wood in the build by taking advantage of the framing system to cover up boards of not all the same length. You would never know in this design that there are lots of shorter scrap pieces used in the build.

More than happy to response to any question or comments. Later...