Daniel from Skillman, Nj writes
The Hi-Light Spray Indicator Blue is not labeled specifically for use on hay or anything being used as a harvest for animals. While most temporary dyes of this nature are food grade colorants that should not harm anything, since it has not been tested for this use by the manufacturer, we cannot recommend it or advise of a pre harvest interval with its use with any other herbicide or products you may be applying it with.
Answer last updated on: 01/15/2021
