Here's a "grow-your-own fence" - the pollarded willows not only supply the withes, they're also the fence posts at Appeltern Gardens -- BelleWood-Gardens - Diary - Love the idea of the living fence posts!
Check out this super easy Raised bed garden design! And you can put little flowers in the cinder block holes as a cute, colorful border too! I'm definitely going to be doing this for my vegetable garden this spring! This design is using 10 cinder blocks