When should you use Milorganite?

Could you please elaborate on the appropriate times to apply Milorganite? Are there specific seasons or growth stages of plants that benefit the most from this product? Additionally, is there a recommended frequency of application, and are there any precautions or guidelines to consider when using Milorganite to ensure optimal results and safety? Understanding these details would be invaluable for gardeners and landscapers seeking to enhance their plant health and fertility.