I just called a rock quarry to see if they have rock dust. The guy said that the rock dust turns to mud when it rains and they don't keep it under cover. He said he has "scalpings", which is about the consistency of sand and that "I wouldn't believe what would grow out of it!". He said he uses it on his lawn and he has the healthiest lawn around. $2 a ton but said if I just want a couple of 5 gallon buckets, he will give it to me for free.
Will "scalpings" work as well as dust or are the particles just too big? The rock is Oregon Basalt.
what do you think?
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