Universal Supply in Pompano/ Broward County is in the rear so just find the address and drive in 200ft
Give them a call because maybe they have the granular pure potassium sulfate again. It was $25 for 50lbs which was a great deal. Last time they only had the quick dissolve kind which was more expensive. I bought some. This will work but you waste time applying a little bit each month during the mango trees active months of March through December. I sprinkle the quick kind on top of the mulch hoping some chelates into the mulch so stays longer.
Please post here if they have the granular K again.
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Potassium increases crop yields because it:
Increases root growth and improves drought tolerance
Builds cellulose and reduces lodging
Activates at least 60 enzymes involved in growth
Aids in photosynthesis and food formation
Helps translocate sugars and starches
Produces grains rich in starch
Increases protein content of plants
Maintains turgor, reduces water loss and wilting
Helps retard the spread of crop diseases and nematodes.
http://www.cropnutrition.com/efu-potassium