I grow my in-ground trees organically, using Espoma Citrus-tone, Alaska Fish Fertilizer 5-1-1 and, occasionally, Bush Doctor Microbe Brew.

However, my Meyer Lemon has some issues with micro-nutrients and I found this about Foliage-Pro: "it will not harm the microbiology of soil. When used with soil, Foliage-Pro acts as an auxiliary source of minerals, supplementing those supplied through the natural breakdown of organic matter."

Is it a true statement or false advertisement? Can I occasionally use Foilage-Pro without harming my soil?