A good question is: have you had a soil analysis done?
If you have mineral deficiencies in your soil, Azomite could be an answer to the problem.
However, it you already have too much of something, adding Azomite may compound the problem.
Here is an analysis of the contents of
Azomite
There are different fineness grades available. YES, wear a dust mask if using the finest powder (which will 'feed' your soil quickest). The dust mask is not needed if using the 'granulated' grade (which is a slower release).
Personally, I believe that most soils would improve greatly with an application.
Besides feeding the plants, it will also feed the soil food web.
The soil is like a chain: its weakest link is the one mineral that is lacking.
Try to find a local distributor, as 44# bags are not what you want to pay shipping on.
Shop around...prices vary greatly.
My source has fine for $16, granulated $20 (for the 44# bags). I have seen it $45 + S/H