Pro-Gro 5-3-4 No Chilean is used just like our regular Pro-Gro 5-3-4 but it is made without Chilean nitrate (natural nitrate of soda). OMRI has reviewed and listed Pro-Gro 5-3-4 No Chilean as an alternative formula for Pro-Gro 5-3-4.
PRO-GRO (No Chilean) – View MSDS (pdf)