Hi there! Detailed information about soil blocks and soil blocking mix recipes can be found at PottingBlocks.com click the 'Blocking Mix' button on the top of the home page.

Here is a link that might be useful: Making Soil Blocks

I'm using the blockers for the first time here, too. I've been referencing Eliot Coleman's recipe for the blocks, but have not been able to find a few of the ingredients here, so I've had to make substitutions. I haven't been doing it long enough to say whether the mix is "successful" or not, though. The blocks are forming well, but that's all I can report at this point. :)

@Greencubes: thank you I will look up the book.
@Macky77: thank you. I read your other post re: the seed locks as well.

Making some blocks for the first time tonight using the micro 20. I'm using Eliot Colemans recipe with Azomite instead of glacial rock dust. The ingredients are tough to find. I have not seen any info on planting depth for the micro 20. I am planting spinach in the micro 20 dimple which usually go 1/4 inch deep. Should be interesting.