Who qualifies as a professional fertilizer applicator?

A professional fertilizer applicator is defined as an individual who applies fertilizer for hire. This designation indicates that the person is engaged in a commercial activity where they apply fertilizer on behalf of others as part of their business. Such individuals are typically trained and may need to be certified to ensure that they follow appropriate regulations and best practices related to fertilizer application, which includes understanding proper techniques, environmental considerations, and safety protocols.

In contrast, the other options describe scenarios where individuals may apply fertilizer but are not necessarily doing so in a professional capacity. Homeowners applying their own fertilizer or volunteers at community gardens typically do not engage in this activity as a profession, and thus do not meet the qualifications of a professional applicator. The critical distinction lies in the aspect of professional engagement and responsibility that comes with being hired to perform fertilizer application for others.