Chemical fertilizer and bio-solids
Steps to dispose of your fertilizer.
See if anyone near you such as neighbors would like to use it thus removing the need to dispose of fertilizer altogether. Keep it stored in a cool dry place where no one underage or a family pet can get to it while trying to locate a hazardous waste facility for the house. When storing keep it in its original packaging and don't mix it with any other type of fertilizer as this could result in dangerous chemical reaction. Start looking for a household hazardous waste facility alternatively local garden centers may take it off you if you contact them.