True Organic Seabird Guano is an organic fertilizer highly valued in organic farming as a great source of Phosphorous and slow-release Nitrogen for plants and soil， which is ideal for vegetative growth Formulation 6-12-0 For in-ground and container plants Apply twice per year in Spring and Fall Highly valued in organic farming as a great source of Phosphorous and slow-release nitrogen for plants and soil microbes Should be mixed into the soil or applied in spring and fall to dramatically increase both the amount and size of blooms throughout the flowering period for all indoor and outdoor plants Potting Mix Made in USA Your security is our number one concern