Amazon salesI have a large vegetable garden and will be ordering myself a bag and pick it up from my cousin's place in Washington in a week or so to give it a try this year. I will hopefully do some side by side comparisons in different pots ( some with, some without) to see how well it does. My girlfriend is also a geologist with access to mineral composition machines at university so hopefully I can get her to do a 3rd party analysiss of the super greensand's composition.