The soil blocker was too slow for me and things I grew in the blocks weren't stable enough to sell.I hope the soil blocker is not just a gimmick. I watched a number of YouTube videos and they were all very positive on the soil blockers. Any reason you gave your soil blocker away?
Last year, I made a DIY soil blocker out of PVC pipe, some blocks of wood, and a long bolt with nuts and washers. It worked OK but only made 1 soil block at a time, and it was round of course using the PVC pipe. My DIY PVC soil blockers worked good as far as starting seeds. So I liked the concept and this year I decided to buy a 4 unit aluminum soil blocker which should make square soil blocks much better to fit into a 10x20 flat. I also bought the plastic concrete mixing bin last year, and it works great.
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I don't have a proper greenhouse, but I made a couple of "mini greenhouses" out of clear storage totes. You just turn the tote upside down so the clear plastic bin is the greenhouse top and the lid becomes and bottom to hold your flat and/or plants. If anyone is interested, here is the best video I have found on YouTube on making a storage tote greenhouse. It's almost 30 minutes long, but he goes into greater detail than other videos on the subject and he tells you from his experience what to look for, and what to avoid, when you buy your tote. So if you are interested in making a mini greenhouse, it's well worth watching this video.
In case you are wondering what tote I got, here it is Hefty 72qt Clear Hi-Rise Storage bin with Stackable Lid Gray. $12 at Target, although I bought mine on sale for around $10 at the time.
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