It has been known for centuries that seabird guano from the dry islands off the coast of South America and the baT guano from dry desert caves of the world make excellent food for plants. The types of rock phos seabird guano, bat guano, earthworm castings, and seaweed used in this special blend are all chosen for their known effects on fruiting and flowering plants.

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Information regarding the contents and levels of metals in this product are available on the internet. http://www.aapfco.org/metals.htm