@Yinon powder like dried worms? I haven't heard of this product. Is it like a processed pellet fertilizer? I have heard of products where black soldier fly larva are the feedstock for fertilizers or crickets are ground up for protein powder. Is this similar?
I run all my kitchen scraps through a worm bin to make castings / vermicompost and then mulch my garden with fall leafs (dropped from a bunch of deciduous trees around the yard) and yard waste. Using these two methods I make all my soil amendments and don't even know what is on the market for home growers as fertilizer and the like.
Something similar yes, here we call that "Organic worm fertilizer" which is basically a verity of humus "fertilizer" if you know what I'm talking about: "Not exactly a fertilizer and not exactly soil, humus is the product of the decomposition of organic materials like leaves and animal waste. Like fertilizer, humus holds nutrients that plants can use".
Anyway, there are different kinds of humus and organic fertilizers here, I'm using (the less popular one) that we call "Amazonas Humus",
(Nothing to do with the Amazon forest in South America), which is basically a powder, that looks like soil, that's made out of 100% worms, grounded worms. (feels dry, looks like soil, smells like soil, very efficient, helped my plants a lot).
(There are some different variants that add charcoal, coconut shell and etc, but I'm currently using the 100% worm fertilizer and some regular Humus for other plants).
P.S
I was thinking the last few weeks about purchasing some live worms, haven't reached any conclusion yet.