Raised bed garden is maybe what you are describing?
You just need to build a box with no top or bottom. No more than 4' wide so you can reach. There are many ways to hold the corners together. I sacrificed interior space to make my boards interlock like Lincoln Logs, but metal "L" brackets in the corners will work too. I used treated lumber and plant vegetables in mine but some are so afraid of the pressure treatment that they won't. That is okay. You could use construction lumber knowing that it will have to be replaced in a couple of years. If construction grade cedar is available in your area it solves both problems but at a cost.
I bought a house last year which had an old above-ground pool that needed a liner. I had the pool removed and left was a big sand pit where weeds are starting to grow...
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Looking to DIY a rock look on a wall. Would like to find something I can sculpt my own rocks with. I have been told cement would be to heavy on a drywall backing. Do...
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I have 2 majesty palm plants. Right now I've got them on 2 plant stands that have to lean against the wall for support. I'd like to build two plant stands that are ta...
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Does anyone have a way of how to hang a window box without having to screw the box or the bracket into the windowsill or the siding? Is there some way of clamping the...
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My lot backs onto the line where this unsightly, cinder-block shed sits. I need an idea to hide it. I have saved a lot of fallen walnut & maple tree branches that I'd...
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https://www.diynetwork.com/how-to/outdoors/structures/how-to-build-a-wooden-planter-box
Raised bed garden is maybe what you are describing?
You just need to build a box with no top or bottom. No more than 4' wide so you can reach. There are many ways to hold the corners together. I sacrificed interior space to make my boards interlock like Lincoln Logs, but metal "L" brackets in the corners will work too. I used treated lumber and plant vegetables in mine but some are so afraid of the pressure treatment that they won't. That is okay. You could use construction lumber knowing that it will have to be replaced in a couple of years. If construction grade cedar is available in your area it solves both problems but at a cost.
You can use pallets, or break them down to use the pallet wood, here are ideas for building:
https://www.hometalk.com/diy/grow/how-to-build-raised-beds-using-pallets-31532189?expand_all_questions=1
http://www.penniesintopearls.com/diy-pallet-wood-raised-garden-beds/
http://www.instructables.com/id/How-to-make-a-raised-bed-garden-box-from-wood-pall/
How to Build Raised Beds Using Pallets
Here's several ideas for you. Happy Building!!
https://www.youtube.com/results?search_query=build+above+ground+planter
You can use pallets-https://www.hometalk.com/diy/-12278119?r=2
Use a thrifted lamp for a small planter. http://www.toworkwithmyhands.com/2018/03/thrift-store-repurpose-lamp-to-garden-planter.html