Wow! You guys have some nice harvests there!!! I have some beets (Dark Detroits) growing in a 24"x15"x9" tote that I got at Walmart and drilled drainage holes into. I use soiless mix like Jetstar. I bought one of those little 6 section things with the starts from a local store. In each of the 6 sections were a bunch of baby beet plants. I separated them all and replanted them into the tote with proper spacing and filled it up. They are doing really well! Not ready for harvest but I have been eating the greens with my chard and am happy with the progress. I hope they turn out as well as the bounty you folks got.
Pete