Natural phosphorus source. Adequate phosphorus results in more vigorous early root formation, better flower and seed production, better growth in cold temperatures, and better water use efficiency.
NPK: 6.9-11.9-0.8 avg. Excellent source of nitrogen and phosphorus. Use as a sidedressing or mix into compost to provide added nitrogen and a bacterial boost. A byproduct of wild-caught fish.
(24% total P₂O₅, 28% Ca) The highest available phosphate of any non-animal source; only guano and bone char carry more. Formed from ancient marine... read more
Recommended by soil gurus Phil Callahan and Mark Fulford. Lowest concentration of heavy metals of any phosphate source. Concentrations of available phosphate were regularly over 6% when tested.
