Patent ID: 8425647

Claim:
A process of preparing a liquid plant fertilizer comprising: receiving two or more colorized, pre-formulated, liquid plant fertilizer concentrate components; selecting a reference hue for a concentrate blend of the two or more colorized, pre-formulated, liquid plant fertilizer concentrate components; blending a first portion of a first colorized, pre-formulated, liquid plant fertilizer concentrate component of the two or more colorized, pre-formulated, liquid plant fertilizer concentrate components with a first portion of a second colorized, pre-formulated, liquid plant fertilizer concentrate component of the two or more colorized, pre-formulated, liquid plant fertilizer concentrate components to make the concentrate blend having a resulting hue; and adding to the concentrate blend, based on a difference between the reference hue and the resulting hue, at least one of: a second portion of the first colorized, pre-formulated, liquid plant fertilizer concentrate component of the two or more colorized, pre-formulated, liquid plant fertilizer concentrate components and a second portion of the second colorized, pre-formulated, liquid plant fertilizer concentrate component of the two or more colorized, pre-formulated, liquid plant fertilizer concentrate components.