Green Phoenix Farms Potassium Sulfate, also known as Sulfate of Potash, (K2SO4) is a dual nutrient supplement with an equivalent potassium content of 50% Potassium Oxide (K2O), commonly referred to as potash, and 50% Sulfate (SO4).
Deficiencies of Potassium (K+) in your plants will often display as a yellowing seen on the older growth of each plant. As well, if you have tomatoes that are cracking and splitting, many times, supplementing with Potassium will help.
Please note US shipping only at this price!!! Please email us if you need shipping outside of the US.