[Aunt Sally]

People rave about all sorts of things Munchkin from drinking 2 litres of water a day to burying a piece of meat to cure warts - doesn't make them valid though

[DD.]

And buying a piece of rhubarb to cure club root!

Define "so many".

The ones that rave about it, are they connected in anyway?

I don't know. I'm just asking the questions that you could research for yourself.

[Munchkin]

Not connect in anyway....unless there is some kind of rock dust conspiracy group LOL. Search for rock dust on youtube and you'll see lots of different peoples vids on it.

[solway cropper]

Rock dust is a good way for quarry companies to get rid of something that to them is a bl**dy nuisance. If they can con 'green' gardeners into buying it so much the better. Without a full analysis of the product it's meaningless. Rock dust from a sandstone quarry would be....sand. From a limestone quarry it would be.....lime. From a granite or basalt quarry you'd end up with a lot of insoluble silicates (sand) and trace amounts of other stuff which would be in your soil anyway. It would probably improve the structure of a heavy clay soil but there's cheaper ways to do that.

[Zippy]

I can't speak for volcanic ash - didn't do the gardens in Pompeii much good. Personally I prefer rocking horse poo myself. I understand its quite rare but worth every shovelful.

[Munchkin]

Thanks for clearing that up SC.