Here is another idea of creating the planter for the garden in the but this one is big. You can see how reshaping the wood pallets can turn them into awesome items for There is no need to paint them as they look amazing in their actual color.
Mixed paving materials - I like how this looks, plus it makes repurposing easier! CT - note: Could get some pavers that match front walk and combine with other materials to tie both looks together. Definitely want the walk to be permeable.