You have found a lousy and inappropriate fertilizer: Calcium carbonate is 
extremely difficult to dissolve, there is no chelator which means that 
the iron will precipitate soon after being added to the water, Zinc oxide? 
- thats just plain bizarre, with the presence of borax and Calcium 
carbonate the fertilizer will be highly alkaline. I would recommend you 
continue youre search.

dave huebert.