>>2715601Oops, just saw the thread died so I'll repost.
I built two soil blockers with wood to test it this year. One produces blocks around 2in long, almost 1in squared area on top, the other 2.5 in square area with a hole the size of the first block, 4-5 in deep.
My plants seem happy for now, I just moved some peppers to the big blocks.