much did you use? I want to?
I want to try this at my home gardens.

Not sure what you're up to here. Rock dust can be beneficial for walkways and as a substrate for paving stones..

If you're using it as a soil conditioner, be sure that you need what it will provide. Lime is actually ground up limestone (calcium carbonate) and it will help to adjust soil pH (acidity/alkalinity). If you have acid soil, it can help buffer soil pH upward, making soils more productive.. but be careful. plants like a particular range for pH- normally between 5.7 and 6.5. If you apply too much lime, you can damage the plants' ability to uptake nutrients.. and have stunted plants.

Further, if your soil is lacking calcium, lime can be applied. This can happen with some sandy soils. Check with your county extension agent to see if soils in your area need lime.

Diatomaceous earth can be used as a natural deterrent to certain insects.. it appears to be a rock dust.

so I dunno- would you want to use it if you don't know what it's going to do for you? I'd think probably not.

good old crap works for me! forget that rock dust... go out and buy some grade A crap!