You can stain the wood to give it a better quality finish or to match the aesthetic that you are looking for.
This might be one of the simplest do-it-yourself woodworking projects on the list. That said, it doesn’t have to look simple. You will need to learn how to cut to a specific depth in order to have enough space for your plants, but that is about all that needs to be done. You can stain the wood to give it a better quality finish or to match the aesthetic that you are looking for. It can be as simple or complicated as you like.