yeah. that's it. langbeinite, mined from ancient sea beds. good stuff. thanks for the reply. i like to use seaweed, kelpmeal, or greensand(mined from the bottom of the ocean) for my potassium. interesting that they all come from the sea.
so i bought a 2bl of the Sunleaves Jamaican and a 5bl of the Primal Harvest.. the primal harvest is like a proccessed powder and the label says ithas a much longer life after application unlike the Sunleaves which looks more like raw guano > like budswell
Sunleaves says every 2 weeks
Primal Harvest says every 3 months
does anyone use Primal Harvest or know anything more about this product ?