We used 2 foot post spikes, but you could use deck blocks which are cheap. We made 8 X 4 panels with viny lattice that we stapled to the panel. Then used cheap brackets screwed to posts to slide the panels in.
This is a great idea for a DIY fence. Cinder blocks and wood - simple and looks nice. This is from the Montrose Green Community Garden in Northcenter neighborhood in Chicago, IL. Could do this behind the potting shed to define walkway.