Its a dye that has been added.  When taken up by the plants, it makes the   
   plant look greener.  Kind of like when a white carnation is put in water that   
   has food coloring and the flower takes on the color of the dye.   
      
   On Thursday, May 10, 2001 at 12:53:22 PM UTC-7, Bill Walker wrote:   
   > Boys & Girls,   
   >   
   > Here's a good one to puzzle over.   
   >   
   > Daddy, why is Miracle Gro blue?   
   >   
   >   
   > Well, I can tell you that my answer - that it's from the CuSO4*5H2O   
   > doesn't seem to right when I consider the amount of iron (III) that's in   
   > solution - almost twice as much.   
   >   
   > It's over half ammonium sulfate and urea, with potassium chloride, some   
   > boric acid, sodium molybdate, copper sulfate, iron (III) EDTA, manganese   
   > (III) EDTA, and maybe some other trace stuff.   
   >   
   > But a mixture of the metal salts / complexes in water ISN'T that cool,   
   > clear blue color that you get when you dissolve those heterogeneous blue   
   > crystals of the commercial product in water.   
   >   
   >   
   > What gives?  Is this an order of addition/physical state problem of   
   > compounding and formulation?   
   > Do the EDTA complexes of Fe and Mn need to be made first, and then added   
   > to CuSO4?   
   >   
   >   
   >   
   > Bill   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)